Doom 3: Phobos

You wake up in a repurposed apartment in Mars City with no memory of who you are or how you got there. A woman named Samantha Miles, agent of a shadowy global conglomerate, says she knows you. While she helps you piece together your identity, you help her track down a missing colleague. Then the events of Doom 3 begin — and the two of you have to survive what follows while the search continues.