Bob the Robber 2
It's not easy being the modern equivalent of Robin Hood. All he had to contend with were a few half-competent sheriff's henchmen. These days an honest, hard-working thief can't catch a break, with everything from security cameras to laser beams plotting against him. Which is why Bob needs your help once more, in Bob the Robber 2, a great little stealth puzzle platformer by Flazm.
Creep around (rather loudly, for a thief) using the [arrow] or [WASD] keys; use the up [arrow] to interact with objects, and the [spacebar] to whack unsuspecting guards. You also have three upgrade slots, bound to [Z], [X] and [C]. Your task is to reach a certain goal (you can't miss it, it's surrounded by arrows), and then make your getaway. Keep away from any creatures/pieces of technology you see guarding the rooms, or you'll set off an alarm; if you set it off four times, you're busted, and then it's back to square one.
There are lots of improvements compared to the original game. For starters, there are ten levels instead of five, and there's a shop where you can buy upgrades. Every time you pick a lock or mess with the electrical box, you get a tiny mini-game, and don't they make everything better? When you knock someone out, you now have a timer so you know exactly when they'll wake up, which really comes in handy. The levels all fit into a single screen, the graphics are improved and the music is toned down a little. The difficulty curve is similar, meaning that it's well calibrated and strikes a nice balance between using your brain and your reflexes. Another fun feature is the fact that you can adapt the gameplay to your own temperament, and either rush through the levels or try to be patient and stealthy.
Now to end with a pun. Bob the Robber 2 is a steal at this price? No, it's a free game. It's criminally entertaining? Laaaame. It'll rob you of your free time? Yes, alright, let's go with that one.