Just downloaded Retrovirus and played for about an hour. I'm a guy who has kept Descent 2 alive on my computers since the mid 90's so I'm the prospective customer Credenza is aiming for. I have to say I'm impressed with the controls and the world is beautiful. I haven't run into any serious action yet in the game but I am totally engrossed so far. Too soon to say if this is the Descent killer we've all been hoping for, but I'm very excited to have stumbled upon this game!