I didn't think they could top SpaceChem, but they did. Channel that Minecraft creativity into the most satisfying puzzle experience on Steam right now.

One of the best PS3 exclusives is now on PC! Really good turn-based/real-time hybrid with satisfying tactics and a unique story.

A fantastic update to an already fantastic game.

An actual traditional roguelike on Steam! Tactical combat, lots of classes, some persistent upgrades. Kind of easy (as of now), but very fun.

Zombie-survival distilled purely to team and inventory management. Hard but fun, and the ability to import real people into the game is good for laughs.

Horror puzzler with a satisfying true ending. Chilling aesthetics, and an experience that is hard to forget.

A great choose-your-own adventure with surprising lasting effects in your choices. Best played with a small group, each person choosing a character.

A fantastic modern update to the infamous alien-containment game. Not as ridiculously in-depth as the original, but way more accessible.

A simple but fun overlooked roguelite, and a big inspiration for FTL. Campaigns can be finished within a half hour.

A simple, novel mechanic makes this a unique and fun platformer. Since the 2.0 update, now has tons of campaigns from lots of notable designers.