I am that odd middle point in life. I'm old and grumpy, but I don't have kids. So when I play a game where insides are spilled, the walls are sticky with gore, and horrific violence is rendered in 1920x1080, I don't think of the children. I think of the janitors. Someone is going to have to clean all that up. There's innards on the outside, the Trafalmadorian ambassador is coming over any minute, and the guy with the guns and helmet just walks away and leaves it all for muggins. There's a toe in the chronosynclastic infundibulum, for crying out loud! Oh no, by all means have all the fun, but when it comes to the real work they leave it for for the Viscera Cleanup Detail crew to soak up the blood and pick up the wobbly bits. It's up to you to make it right.
Yup, it's a first-person game where you're the mop pusher in a facility following a sci-fi battle. You have your bucket to wipe off the blood, gloves and incinerators to deal with the chunkier bits, there's even bullet casings to remove. I can't say it's as fun as shooting things, but it's not nearly as dull as you'd imagine. It has that odd satisfaction of a job well done.
You can grab it for free, and it's begging for Greenlight inclusion. I can already picture the Team Fortress 2 crossover: you have to clean-up Badwater, but all the gore has been taken from a round of the game.