In sci-fi games like Mass Effect and Halo, players kill hundreds of aliens. Viscera Cleanup Detail isn't one of those games. Instead, Viscera puts you in the shoes of the janitor who arrives on scene after the battle is over.
"Disaster! An alien invasion and subsequent infestation have decimated this facility," says the official website. "Many lives were lost, the facility was ruined and the aliens were unstoppable. All hope was lost until one survivor found the courage to fight back and put the aliens in their place! It was a long and horrific battle as the survivor dueled with all manner of horrific life-forms and alien mutations, but our hero won out in the end and destroyed the alien menace! Humanity was saved!"
"Unfortunately, the alien infestation and the heroic efforts of the courageous survivors have left rather a mess thoughout the facility. As the janitor, it is your duty to get this place cleaned up. So grab your mop and roll up your sleeves, this is gonna be one messy job. Today you're on Viscera Cleanup Detail!"
In the game, you wipe up all the traces of the battle. You use a mop to clean up the pools of blood and stop every so often to re-wet the mop. You can also pick up any stray organs or bullets and put them in a trash bin. These bins can then be incinerated. I'd go so far as to call it the most detailed space-station janitor simulator on the market.
The early alpha prototype was built by developer RuneStorm in 10 days. It can be downloaded for PC through IndieDB or AtomicGamer. RuneStorm says you shouldn't expect it to be very polished or "resemble a completed game at all."
Like Surgeon Simulator 2013, Viscera is a joke in game form. I'm curious to see if and how they try to build it into an actual game, though. The Steam Greenlight page for the game says that co-op or another type of multiplayer is one of the top priorities. Maybe they'll add a way for players to win the game as well.