PSA:I've owned it on D2D for years. Downloaded and activated it no less than a billion times. All the mods work just fine. Buy it and launch it through Steam if you must, but you really should buy it.
Irrational put a crazy atmospheric spin on what most people would expect to be pretty run of the mill string of environments.
You'll have to tactically enter the house of a serial killer, carefully going room to room. Be mindful though, his mom is crazy and he's a little trigger happy himself. There are hostages.
Breach a diner robbery gone wrong. There's a full staff on hand, so spraying an AR will quickly take you back to the menu screen.
How about a club with a gang skirmish going on inside? Way more civilians than hostiles. Should you bring a less lethal weapon instead of a gun? Risky considering the gang war going on inside, but taking live ammo is also pretty risky unless you want to chance popping the head of a club goer with a stray 5.56 slug.
You should be able to run the game with a tin can and a AA battery these day. Requirements are pretty low. They're posted on D2D.
*Not my screen caps and you'll blow these away with anything north of an 8800/4850.