Shutter is a survival horror game in which you must progress through levels while avoiding paranormal activity and solving puzzles. The story will progress as the player goes through the levels.
Infinite Space for Sins of a Solar Empire: Rebellion. The mod enhances the overall look and feel of the game by adding a ton of new planets and planet types, planet bonuses, rendering, tweaks and much more!
Doomsday Engine is an enhanced DOOM source port for Windows, Mac OS X, and various Unix platforms. It is based on the source code of id Software's DOOM and Raven Software's Heretic and Hexen.
Celestial Mechanica delivers a mixture of action, puzzle, exploration and adventure while sporting the awesome "pixely-goodness" you've come to expect from Paul Veer and "sexy ear candy" from Roger Hicks.