Clevar puzzle platformer based around manipulating liquids of various types. If you liked Braid's puzzles this might be some more goodness for you.

The game is buggy and prone to crashing; gameplay opaque and poorly explained with some frustrating design descisions; and plot borderline nonesense to me, and I understand gibberish quite well so that's saying a lot. But I played it until five in the morning the day I got it. That's proof of quality to me. Playing an (eventually) unstoppable psychic cyber templar is simply awesome.

I've literally spent days worth of time playing this. My only complaint is that there isn't even more of the vast amount of things in the game; notice I said "vast". You start out as some frail smuck that can barly hold off the zombies at night, hiding in a house you improvise from dirt; to a near invincible adventururer that can run across the world in a few minutes and slay any fiend in the game, with an impregnable fortress that you bult and filled with NPCs that come after you feats of glory. Also you have to make all the better equipment in the game, and build said fortress, so get on it; exalted quipment and castles don't make themselves.