Carrion

Carrion is a reverse horror game in which you assume the role of an amorphous creature of unknown origin. Stalk and consume those that imprisoned you to spread fear and panic throughout the facility. Grow and evolve as you tear down this prison and acquire more and more devastating abilities on the path to retribution.

Gameplay
Players control a red, amorphous, tentacled monster (hinted at by the game as an unknown species of Tubifex worm). The monster must make its way through a facility, crawling through vents and killing scientists and soldiers. As the game progresses, players can obtain upgrades such as the ability to dash—which can be used to break through wooden barricades and access otherwise unreachable areas—and to grow in size.

Plot and synopsis
The titular organism is held in a containment unit within a research facility owned by a Seattle formed science company called Relith Science. The creature breaks out and progresses through the facility in order to find an exit. As the organism progresses through the facility, it fights and devours its way through the facility's staff and security forces. Along the way, the creature discovers pieces of its genetic code removed by the scientists for study and containment, which allow it to evolve, allowing for greater size and more means of both defense and offense.

The creature also encounters material analyzers which, upon entering, trigger flashbacks revealing its origins. The carrion was originally found in a abandoned labs with biomass by three scientists, and upon awakening, killed two and possessed the third. However, Relith security forces arrive and execute the remaining scientist, forcing the creature out. Eventually, the creature returns to its initial containment area and absorbs the last piece of its stolen genetics, allowing it to transform into a human form as the scientist which it's originally infected. The disguised creature then escapes the facility into the city of Seattle, which appears to have been quarantined.

Minimum Requirements

 * Requires a 64-bit processor and operating system
 * OS:  Windows 7 SP1
 * Processor:  2 core processor
 * Memory:  1024 MB RAM
 * Graphics:  compatible with OpenGL 3.0
 * Storage:  500 MB available space