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Games developed by KOEI Co., Ltd.

We provide a list of companies that developed abandonware games. Select a company to view its games. To make searching easier, use pagination by number or letter.

Aerobiz

Aerobiz, released in 1992 for the Sega Genesis, was a groundbreaking simulation game that allowed players to experience the complexities and challenges of running an airline company. Developed by Koei and published by Electronic Arts, Aerobiz gained widespread popularity for its unique gameplay, strategic elements, and realistic portrayal of the airline industry. The premise of Aerobiz was simple yet engaging - players take on the role of a CEO of a newly established airline company and must compete against other AI-controlled companies to become the most successful airline in the world. The game allowed players to choose from four different major cities - Tokyo, Paris, London, and New York - as their company's headquarters and then expand their routes to different cities around the world. This added an element of realism as players had to take into account various factors like demand, distance, and competition when choosing their routes. The game featured an in-depth management system where players had to make crucial decisions like buying or leasing new aircraft, setting ticket prices, and forming alliances with other airlines. These decisions affected the company's finances, reputation, and overall success. The game also incorporated a real-time world map, which showed the actual time zones and flight duration between cities, adding an extra layer of authenticity to the gameplay. One of the most impressive aspects of Aerobiz was the high level of detail and accuracy in its simulation. The game had a vast database of over 300 cities and their specific characteristics, such as population, GDP, and geographical location. It also included real-life events like natural disasters and economic crises that could affect the airline industry, making the game even more challenging and unpredictable. Aerobiz also offered two different game modes - Competition and Scenario. In Competition mode, players could compete against up to three AI-controlled companies in a race to become the most successful airline in the world. In Scenario mode, they had to overcome specific challenges, such as starting with a limited budget or facing fierce competition from a well-established airline. The game's graphics and sound were top-notch for its time, with detailed and colorful city maps and catchy background music. The interface was user-friendly, making it easy for players to navigate through the game's various menus and options. Despite its age, Aerobiz remains a highly regarded and beloved game among fans of simulation games. It was a pioneer in its genre and set the standard for future airline simulation games. With its unique gameplay, strategic elements, and immersive simulation, Aerobiz continues to be a memorable and enjoyable gaming experience even after almost three decades since its release.

Aerobiz Supersonic

Genesis 1994
Aerobiz Supersonic arrived on the Sega Genesis in 1994 as a grandiose tilt at economic strategy disguised as an airline empire. From the opening screen you sense a decision heavy playground where global geography becomes a board and numbers carry the freight of ambition. The game builds on the lineage of its predecessor with enough refinements to feel like a serious sim rather than a casual pastime. Players assume control of an airline in a race to dominate air travel, balancing fleet choices, passenger demand, route placement, and the stubborn arithmetic of cost versus revenue across continents. What makes the loop engrossing is its weaponized bureaucracy. You purchase aircraft from a catalog spanning aging prop liners to gleaming jetliners and then decide where to fly them. A station network grows with every cautious expansion, rewarding you with revenue when routes run on time and passenger satisfaction climbs. Yet the clock tics forward and fuel prices swing with every global fluctuation, forcing recalibration of schedules and fares. Random events pull the rug or lift a charter flight through eruptions of political news, weather disturbances, and rare but consequential crises that can bankrupt even cautious plans. Every flight is a heartbeat in a global bloodstream of supply and demand. You pit your airline against rival firms controlled by cunning AI that emulate cutthroat strategies and opportunistic gambits. Shrewd decisions about hub placement, route exclusivity, and fleet rotation keep margins fluttering, while marketing wars around lucrative markets demand careful budgeting. The Supersonic edition widens the horizon with additional airports, more planes, and tighter regulatory quirks that make long foresight essential. The thrill comes from stitching together a network that toes the line between abundance and bankruptcy, sustaining growth without waking a collapse. Even today Aerobiz Supersonic feels like a pilgrimage into the mind of a meticulous planner. The presentation carries the weight of 90s design ethos, where menus breathe with dense statistics and the map hums with potential. Its soundtrack, if you recall, is functional rather than lush, a reminder that elegance here resides in systems not aesthetics. For new players the rule book reads like a compact encyclopedia, yet the payoff arrives as soon as you map a chain of strong routes and watch profits accumulate. It stands as a testament to how a simple premise can bloom into a sprawling, almost stubborn, simulation that rewards perseverance. A true relic of strategy.

Air Management '96

Air Management '96 is a strategic simulation game released for the SEGA Saturn in 1996. Developed by Koei, this game allows players to take on the role of an airport manager and build and manage their own airline empire. With its immersive gameplay and detailed graphics, Air Management '96 quickly became a fan favorite among flight simulation enthusiasts. The game offers players a vast array of customization options, from building terminals and runways to selecting the types of planes and destinations for their flights. As the manager, players must make strategic decisions to ensure the success of their airline. This includes setting ticket prices, managing personnel and schedules, and acquiring new aircraft. Each decision must be carefully thought out, as it can have a significant impact on the overall success of the airline. One of the standout features of Air Management '96 is its realistic simulation of the airline industry. Players must take into account various factors such as weather conditions, fuel costs, and maintenance schedules. These elements add a level of complexity and challenge to the game, making it a true test of strategic thinking and management skills. In addition to the classic single-player mode, Air Management '96 also offers a multiplayer mode where players can compete against each other in real-time. This adds another layer of excitement and competition to the game, making it a perfect choice for game nights with friends. The game's graphics are impressive for its time, with detailed 3D models of airplanes and airports. The sound effects also add to the immersion, with realistic in-flight announcements and background noises of a bustling airport. Despite being released in 1996, Air Management '96's graphics and sound still hold up well today, making it a timeless classic for SEGA Saturn fans. Air Management '96 is not just a game, but a full-fledged experience that allows players to get a taste of what it's like to run their own airline. The attention to detail and realistic simulation elements make it a must-play for both casual and hardcore gamers alike. With its challenging gameplay, expansive customization options, and multiplayer mode, Air Management '96 truly stands out as one of the best simulation games on the SEGA Saturn.

Angelique

Angelique is a role-playing simulation game that was released in 1996 for the SEGA Saturn console. Developed by Ruby Party, this game quickly gained popularity and became a fan favorite among SEGA Saturn players. The game's unique concept, rich storyline, and beautiful graphics make it a standout title in the SEGA Saturn gaming library. The game follows the story of Angelique Limoges, a young girl who is thrown into a world of fantasy and magic. She is tasked with saving the world of Arcadia from a dark force known as the Black Queen. Along her journey, Angelique must gather a group of guardians, known as the Sacred Guardians, and build a strong relationship with them in order to defeat the evil queen. The game also features a romantic element, as Angelique must also choose a guardian to become the next king of Arcadia. One of the standout features of Angelique is the relationship building aspect of the game. As Angelique interacts with the Sacred Guardians, players must make choices that will affect their relationship with them. These choices will not only impact the storyline, but also determine the ending of the game. This adds a unique level of depth and replay value to the game, as players can aim for different endings depending on their choices. Another impressive aspect of Angelique is the stunning graphics. The game features beautifully designed backgrounds and character designs that truly bring the world of Arcadia to life. The SEGA Saturn's hardware capabilities were fully utilized to create a visually stunning game that still holds up today. In addition to its captivating storyline and graphics, Angelique also boasts an impressive soundtrack. The game features a mix of dramatic and lighthearted tracks that perfectly complement the different scenes and moods throughout the game. It's no wonder that the soundtrack was later released as a separate album and gained a cult following among fans. The success of Angelique led to the release of several sequels and spin-offs, making it one of the most well-known and beloved SEGA Saturn games. Its unique blend of role-playing, simulation, and romantic elements captivated players and solidified its place in gaming history.

Angelique: Tenkū no Requiem

PC-FX 1998
Angelique: Tenkū no Requiem is a PC-FX adventure and romance title released in 1998 as part of the Angelique franchise. Players assume the role of a young noblewoman who arrives at a floating metropolis in the skies, a society where airships glide between tiered platforms and gilded salons. The setting blends royal ceremony with a touch of aerial technology, crafting a stage for court life and hidden histories. The core experience centers on forming meaningful connections with a cast of noble suitors and guardians, guided by careful dialogue choices and the rhythms of daily life. Gameplay unfolds through dialogue, events, and calendar-based planning. Players navigate conversations by selecting responses that reveal personality and intent, while a relationship gauge tracks affection, trust, and influence toward each suitor. Progress opens new conversations, private moments, and special scenes, with story branches leading to multiple routes and endings. The game rewards consistency and tact, rewarding steady attention with favorable moods and invitations to exclusive gatherings, performances, and one-on-one discussions that deepen bonds. Visual style emphasizes refined, anime-influenced character portraits over lush background art. Characters exist as expressive sprites and large illustrated CGs during pivotal moments, set against hand-drawn interiors, skies, and cityscapes rendered with soft lighting and decorative frames. The interface presents ornate menus, decorative cursors, and status indicators that feel at once regal and accessible. Lighting shifts, seasonal motifs, and ceremonial garb underscore status and mood, while animation interplays with still imagery to convey warmth and tension in interpersonal scenes. Audio complements the visuals with a lush score that weaves orchestral and chamber textures, underscored by motifs associated with each suitor and key locations. Voice snippets mark important lines in major scenes, enhancing mood without overwhelming the player. Ambient sound effects evoke wind on platforms, distant engines, and murmured conversations in gilded halls, creating a sense of presence within the skybound city. The overall sound design aims for a graceful, immersive atmosphere appropriate to an aristocratic romance. Player experience centers on exploration of personality and motive within a formal society that rewards discretion and tact. The tempo accommodates leisurely dialogue, puzzle-like event chains, and the satisfaction of unlocking new scenes across multiple routes. Replay value comes from pursuing different suitors, endings, and subplots, as well as variations in outfits, gifts, and conversation approaches. Angelique: Tenkū no Requiem presents a cohesive, elegant fantasy where romance and intrigue intertwine against a setting of wind-swept towers and glassy avenues in the heavens.

Band-kun

FM Towns 1991
The gaming world was taken by storm in 1991 when the FM Towns game, Band-kun, was released. Developed by renowned Japanese game developer, Icon, this game revolutionized the role-playing genre with its unique gameplay and captivating storyline. Band-kun is set in a futuristic world where music has been deemed illegal and is banned by the government. The main character, Kaito, is a member of a rebellion group called "The Bandits" who are fighting to bring back music to the world. As Kaito, the player must navigate through different levels, battling enemies and bosses to ultimately overthrow the government and save music. The game's graphics were highly advanced for its time, and it utilized the FM Towns' graphics capabilities to the fullest. The characters were vibrant and stunningly designed, and the in-game animations were smooth and fluid. The game's soundtrack, composed by legendary musician and game composer, Nobuo Uematsu, added an extra layer of depth to the gameplay. One of the most innovative aspects of Band-kun was its combat system. Unlike other RPGs at the time, Band-kun introduced a music-based combat system where the player had to time their attacks and defend against enemy attacks by pressing buttons in sync with the music. This unique gameplay mechanic kept players engaged and added a new level of challenge to the game. But Band-kun was not just about fighting enemies. The game also incorporated puzzle-solving elements, where players had to use their music skills to solve puzzles and progress through the game. This added a refreshing twist to the traditional RPG formula and made the game stand out from its competitors. Another noteworthy aspect of Band-kun was its branching storyline. Throughout the game, players encountered multiple choices and decisions that would ultimately affect the outcome of the game. This added to the game's replay value as players were motivated to go back and make different decisions to experience the various endings. Band-kun was not just a game; it was an experience. It captured the hearts of gamers with its engaging storyline, innovative gameplay mechanics, and stunning graphics and sound. It received critical acclaim and is still remembered as one of the greatest RPGs of all time.

Bandit Kings of Ancient China

Bandit Kings of Ancient China is a legendary strategy game that was released in 1989 for the DOS platform. Developed by Koei, this game takes players back in time to the tumultuous era of Ancient China. As the title suggests, players take on the role of bandits in a quest to become the ultimate ruler of China. The game is set during the Three Kingdoms period, a time of chaos and war in China. It features a turn-based gameplay where players must navigate through various challenges and battles to emerge victorious. The goal is to gather an army of skilled warriors and defeat rival bandits, as well as the powerful armies of the Han Dynasty. What sets this game apart is its unique blend of strategy, role-playing, and management elements. Players must not only lead their armies into battles but also manage resources, make strategic alliances, and make tough decisions to survive in a risky world of banditry. These elements create an immersive experience, allowing players to feel like they are truly leading a bandit clan. The visuals of Bandit Kings of Ancient China are simple yet effective. The game's interface is easy to navigate, and players can easily access various menus and information about their clan, armies, and resources. The graphics are well-crafted, with detailed character portraits and varied landscapes that change with the seasons. One of the most significant features of the game is the extensive character customization options. Players can create their own bandit character, choosing from various personalities, backgrounds, and specialties. Each character has their own strengths and weaknesses, making the game even more challenging and dynamic. Bandit Kings of Ancient China also offers multiple storylines and endings, depending on the choices made by the player. This adds to the game's replay value, as players can explore different outcomes and strategies in each playthrough. With over 130 playable characters and endless gameplay possibilities, this game offers hours of entertainment for strategy game enthusiasts.

Celtic Tales: Balor of the Evil Eye

DOS 1995
Celtic Tales: Balor of the Evil Eye, released in 1995, is a notable entry in the realm of DOS gaming that blends mythology with captivating storytelling. Developed by the talented team at Imagitec Design, this title immerses players in a rich tapestry woven from the fabric of ancient Celtic folklore. Drawing inspiration from the epic tales of heroes and mythic creatures, the game allows players to explore a world filled with adventure, magic, and peril. In this engaging narrative, players take on the role of a young hero on a quest to defeat the malevolent Balor, an antagonist whose legendary evil eye has the power to turn the bravest warriors to stone. As players journey through verdant landscapes and treacherous territories, they encounter a myriad of challenges that test their wit and courage. The lush graphics of the time, combined with atmospheric sound effects, help to create a hauntingly beautiful environment that resonates with the themes of ancient Celtic culture. Gameplay in Celtic Tales is multifaceted, blending elements of action, puzzle-solving, and exploration. The game employs a point-and-click interface that was becoming increasingly popular in the 90s, allowing players to interact with various characters and elements within the environment. Throughout the adventure, players must gather magical items, solve riddles, and forge alliances with mythical beings, each interaction contributing to a larger narrative that unfolds steadily as they progress. The storyline is enriched by a diverse cast of characters, each infused with personality and depth. Encounters with entities such as wizards, faeries, and fearsome warriors create a sense of immersion that encourages players to engage deeply with the plot. Alongside the main quest, side missions offer additional layers of storytelling, revealing intricate backstories and drawing players into the essence of Celtic mythology. This attention to detail elevates the gaming experience to one that’s not just entertaining, but also educational, shedding light on legends that shaped the cultural landscape. Although it was released in a time dominated by 2D graphics, Celtic Tales remains a charming classic. The blend of engaging gameplay and captivating storytelling ensures that it occupies a cherished space in the hearts of those who experienced it. Reflecting upon its legacy reveals a game that not only entertained but also expanded the horizons of interactive storytelling, leaving behind an enduring influence on future adventure games. Whether one is revisiting this nostalgic title or discovering it for the first time, the enchantment of Celtic Tales: Balor of the Evil Eye continues to resonate through its well-crafted world.

Daikōkai Jidai III: Costa del Sol

Mac 1997
Daikōkai Jidai III: Costa del Sol is a Macintosh strategy game that places players at the helm of a growing maritime state along a sun-washed shore. Released in 1997, the title blends grand-scale campaign planning with intimate character interactions, presenting a world where commerce, diplomacy, and naval power determine the balance of influence on the Costa del Sol littoral. Players assume command of fleets, garrisons, and guilds, guiding a lineage of leaders through eras of expansion, conflict, and alliance. The game emphasizes depth of systems over rapid action, inviting careful preparation. On the strategic map, the world unfolds as a tiled ocean and coastline with clustered ports, safe harbors, and contested passes. Players maneuver fleets by turn, allocate ships, crews, and gunpowder resources, and establish overland routes for caravans and troops. Each city offers its own menu of production, levy options, and political levers. Economic flow is governed by tariffs, tribute, and trade goods such as silk, spices, and timber. Diplomacy allows tentative alliances, marriages of convenience, and hostilities declared with measured calls to arms. Combat is tactical and modular, resolved on a distinct battle grid where sea skirmishes and land sieges play out with clear unit icons and morale gauges. Naval units include galleons and brigs; land contingents range from pikemen to arquebusiers, with leaders offering special abilities. Fatigue, supply, and weather sway outcomes, encouraging players to scout routes and maintain relief convoys. Quests arise from envoys, merchant guilds, and local governors, while rumors and random encounters reward or punish risk-taking. The campaign threads together a coherent, if demanding, progression from frontier outposts to influential metropolitan centers. Visually, Costa del Sol favors a crisp isometric presentation with a hand-drawn flavor. Buildings and ships are illustrated in a detailed, brightly colored style that preserves legibility on Macintosh displays of the era. Terrain textures simulate shoreline, dunes, and orchard belts, while a soft parallax effect lends depth to the coastal maps. The interface presents inventories, fleets, and quest logs in ornate panels with scrollwork motifs, designed to feel like a navigator’s ledger. Audio complements the setting with MIDI-driven chords, percussion that marks milestones, and period-appropriate folk melodies that accompany routine travel and decisive battles. Player experience centers on measured progression, where success hinges on timing, resource management, and political tact. Short-term gains must be weighed against long-term plans, as control of a harbor influences taxation, recruitment, and security across adjacent provinces. The game rewards careful reconnaissance, patient expansion, and the crafting of durable allies. Replay value comes from different faction alignments, town specialties, and the shifting balance of power along the coast. By balancing commerce, strategy, and narrative choice, Daikōkai Jidai III: Costa del Sol offers a coherent and immersive encounter for Macintosh strategy enthusiasts.

Daikōkai Jidai: Gaiden

In 1998, SEGA Saturn released a highly anticipated game called Daikōkai Jidai: Gaiden. This strategy game, also known as Uncharted Waters: El Navegante in North America, was developed by Koei and is the fourth installment in the popular Uncharted Waters series. The game takes place during the 16th century, a time of exploration and discovery, and puts players in the role of a captain navigating the seas in search of fame, fortune, and adventure. One of the most striking features of Daikōkai Jidai: Gaiden is its vast open world. Players can choose to sail as one of six playable characters, each with their own unique storyline and personal objectives. From Japan to Europe, the game offers a whole new level of freedom for players to explore and trade in various ports along the way. This adds an extra layer of depth and replayability to the game, as each gameplay experience can be entirely different from the last. The graphics of Daikōkai Jidai: Gaiden are impressive for its time. The 2D sprites and backgrounds are beautifully rendered and add to the overall immersive experience of the game. Whether you are in the open seas or in a bustling port, the attention to detail in the graphics truly brings the game to life. The music and sound effects also add a sense of authenticity to the game, making players feel like they are truly sailing the high seas. The gameplay of Daikōkai Jidai: Gaiden is a mix of simulation and strategy. As a captain, players must manage their crew, keep an eye on supplies, and make important decisions that will affect the outcome of their journey. The game also incorporates battles on both land and sea, adding an exciting element to the gameplay. The battles are turn-based and require strategic thinking, as players must consider factors such as weather conditions, ammunition, and the enemy's strengths and weaknesses. One of the highlights of Daikōkai Jidai: Gaiden is its deep and engrossing storyline. Each character has their own motivations and goals, and players must navigate their journeys through various events and encounters that shape their fate. The game also offers multiple endings, based on the choices players make throughout their adventure. This adds a level of unpredictability and excitement, as players never know what consequences their decisions will have. Despite its release being over two decades ago, Daikōkai Jidai: Gaiden remains a beloved game among fans. Its engaging gameplay, immersive world, and captivating storyline continue to draw new players in even today. The game has also been praised for its historical accuracy and attention to detail, adding an educational element to the gaming experience.
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