Game Dev Tycoon caused
a tiny bit of stir in gaming circles lately - You play as a game developer. In an ironic twist, if you pirate Game Dev Tycoon via the torrent that the devs themselves put up as an experiment, your in-game company will fail through loss of sales due to piracy.
But yeah,
I watched Crendor play it, then
gave it a try myself. For some reason I find it fun even though it's basically watching bars and stats go up and down depending on your choices.
Also
Kerbal Space Program is fun even though it's a bit unfinished while being difficult to master due to lack of in-depth tutorials: Designing a space ship that sent a crew into orbit, then to the "moon" and safely back without running out of fuel gave me a massive sense of acheivement since it took me 30 hours of play and several attempts to work out how its done - And that was with a rough text guide. Heh.