It's crazy to think that I originally covered Probability 0 way back in 2010, when it was a freeware game. Creator Droqen eventually turned this fantastic roguelike-like (I know, I hate that term too) into a fully-fledged commercial game, and if you didn't buy it, you totally missed out on an experience equal to that of Spelunky.

But never fear! The game has been released on Steam, so you can redeem yourself all these years later. It's all about going down into the depths of madness, killing enemies along the way to up your skills and abilities, and surviving for as long as possible. Make sure you check this one out.