There are three editions of Hexcells: Hexcells, Hexcells Plus, and Hexcelles Infinite. They're all developed by Matthew Brown, who has a couple of other games out now that also look cool.
He describes Hexcells as an "ambient puzzle game" and I'd say that's a pretty apt descriptor.
|Hexcells screenshot courtesy Matthew Brown|
The game play of Hexcells is, unsurprisingly, like Minesweeper with hexagonal cells. There are some twists and turns thrown in (as you can see above, sometimes you get hints about how many "mines" in a specific column rather than in the surrounding tiles), but it's still very straightforward.
For extra stress-relief, zone-out experience, there is the soundtrack. On its own it's great chill-out music, but the creative little touch is the inclusion of the game play in the music. Every time you either find a "bomb" or clear out a cell, a subtle audio cue plays—in perfect synchronization with the soundtrack. There's something about uncovering the blue cells or destroying the yellow ones to play with the soundtrack that makes things even more satisfying. Headphones are a must.
As for the puzzles themselves, they're well designed. They might err on the side of too easy, but not that often. (Of course, I say this without having even cleared Hexcells yet.) I've had a couple where I had to sit and think for a while, and a few where I had to ask JV to come over to see if I had missed anything. Funnily enough, sometimes the act of looking away from the screen to talk to him was enough to refresh my brain: I'd look back and see the critical bit I had missed.
You can get the whole set for around $10 US on Steam. If you're not sure it'll be your thing, you can just get the first for $3 US.