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Games developed by Sigma LLC

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.

Alien Shooter

Windows 2003
Alien Shooter, released in 2003, is an action-packed, top-down shooter game developed and published by Sigma Team. It is set in a futuristic sci-fi world where the player, as one of the few remaining survivors of a massive alien invasion, must battle their way through hordes of alien enemies to save the human race. The game features a variety of weapons and abilities that the player can use to fight off the alien horde. These include machine guns, pistols, rockets, and even a powerful laser gun. There are also items such as medkits, armor, and ammunition that can be collected to help the player survive the onslaught. The game also features a variety of alien enemies, from small, insect-like creatures to massive, hulking aliens. As the player progresses through the game, they must face increasingly difficult enemies, as well as levels of bosses. These bosses can be quite challenging, and require a great deal of strategy and skill to defeat. The game also features a unique mission system, which allows players to choose their own objectives and how they want to complete them. This gives the game a lot of replayability value, as players can choose different missions depending on how they want to approach and tackle the alien threat. Alien Shooter is an excellent game that gives players an intense, action-packed experience. The variety of weapons and enemies, as well as the mission system, make it a great choice for those looking for a challenging and engaging shooter game.

Theseus: Return of the Hero

Windows 2005
Theseus: Return of the Hero, released for Windows in 2005, revisits Greek myth with a surprisingly practical design sense. Players step into the mythic shoes of Theseus, navigating a chain of myth inspired locations that feel like temples, battlegrounds, and ceremonial corridors stitched together by an ominous campaign against monsters. The narrative emphasis stays on momentum rather than elaborate cut scenes, so the hero’s progress through legendary settings drives the experience. Even when the plot is familiar, the game treats each environment like a new puzzle box with its own rhythm of hazards. Combat and traversal are built around a straightforward, reliable feel. Theseus swings and strikes with enemy targeting that keeps encounters readable, while movement supports constant repositioning, such as circling foes or slipping through narrow lanes. The action is tempered by puzzle elements, where switches, keys, and environmental logic often decide whether a room becomes a fight or a brief tactical break. This blend suits players who want constant objectives without drowning in menus. Skill growth comes less from complex combos and more from learning enemy patterns and timing approaches. The title’s structure relies on set piece progression, including gauntlet style segments and larger chambers that reward careful observation. Traps and environmental threats create tension even when enemies are scarce. Locking mechanisms, destructible objects, and interactable architecture encourage experimentation, and the game rarely punishes curiosity. Weapon management stays minimal, yet the choices matter when resources are limited or when a specific attack timing is needed to break an adversary’s guard. Visually, the game reflects early to mid 2000s Windows production values: clear silhouettes, readable lighting, and textures that prioritize legibility over cinematic gloss. Animations are serviceable, with combat motion designed for feedback rather than style. Audio provides the proper mythic atmosphere through ambient soundscapes and impactful strikes, and voice work, when present, supports the sense of urgency during key moments. Performance and controls on Windows were generally in the comfortable range for its era, with options to adjust configuration so the title could run smoothly across common hardware of the time. While it is not as widely remembered as major genre staples, the game remains a solid choice for players who enjoy mythic action with puzzle interruptions and a clear, goal oriented flow. For a 2005 release, it succeeds at delivering a playable, atmospheric tour through legend without excessive complexity.
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