Warlock's Tower [Steam store page]
I quite enjoyed this, although about 45 minutes in I'm already 100% done with 2 out of 5 worlds and well on my way to finishing the third, and the game still doesn't seem as "punishing" as the store description would lead you to believe.

There's no downside to losing or restarting a level, and the "brutal rule" of one move, one life lost, is the core puzzle mechanic of the game - you count your steps to nearby life pickups, and figure out the order you need to survive.

This gets more challenging when enemies move at certain intervals as well, but I only found one level so far where that really complicated matters. Overall it was a relaxing and enjoyable puzzle experience so far.

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Hotline Miami [Steam store page]
Prepare to enjoy smashing open heads with a bat, slitting throats, and shooting enemies at breakneck speed in a psychedelic environment.

Hexcells Plus [Steam store page]
Basically the same as Hexcells, just adding another set of levels - since this game doesn't randomly generate them (unless you buy Hexcells Infinite).

Minesweeper on steroids - this is a great take on the genre, adding a lot more elements while still keeping a good deductive feel.

For me this game fell somewhere between Legend of Grimrock and Legend of Grimrock 2 - not quite as good as the open-world of the second game, but Vaporum's voice acting made it more of an engaging experience than the original Grimrock.

Quern - Undying Thoughts [Steam store page]
A really enjoyable first-person puzzle game, with unique challenges and an attractive environment.

You may need a game guide now and then, because the island is expansive, but the majority of the puzzles can be solved by logic rather than guesswork. The exceptions are ones where you may not realize a game mechanic is possible.

Furious Angels [Steam store page]
Simple yet elegant gameplay. This is a great example of how to make a game engaging but super accessible.

PAYDAY The Heist [Steam store page]
A fun co-op experience. The latest AI patch made it much easier to play without all four players being human. Enemy AI still has nearly perfect aim, but the body armor balances nicely if you use cover. You earn new guns and upgrades as you play.

This is a well polished and reasonably innovative machine building puzzle game. The interface is complex yet easy to use, and the game can be challenging. The graphics are clean and simple, but fitting. A well done indie.

This nicely polished sliding puzzle game is fun yet challenging. Solving the levels in the correct amount of moves is simple, but the time limits are amazingly difficult if you choose to attempt them. A huge amount of different levels to complete

This slick looking puzzle game is simple, but enjoyable. As the game progresses you unlock six special abilities and more complex puzzles to go with them. Aside from the simple 'normal' puzzles, there are also 'hard' and 'bonus' levels.

Frozen Synapse [Steam store page]
A challenging turn-based squad tactics game, though sometimes the previews are completely wrong. Sadly, game invites pop up even when you're marked unavailable or playing single-player. You must completely exit a level to adjust resolution or sound.

Revenge of the Titans [Steam store page]
A tower defence game that keeps you on your toes. There are tons of upgrades and not enough time to buy all of them - you definitely won't get through all the levels on the first try.

A decent puzzle flying platformer - the pod has no propulsion so you must use cannons, bouncing, etc to navigate the map. The controls do take a bit of getting used to - especially when bouncing - that's my only complaint

Counter-Strike: Source [Steam store page]
More realistic and slower paced than some other shooters. The guns also tend to be less accurate than your normal video game for realism, and shooting while you run is nearly impossible. Still, a reasonably fun multi-player FPS.

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