Bullet Witch. $4 and I knew it would be bad, but bad games are fun for me so I gave it a go. It's pretty much unplayable, since you get one small map and the enemies don't respawn. I cleared the area and was left to wander the area alone, since the only NPCs were the enemies.
Also, the original Dragon's Dogma. I found out after the first time I finished that there was a re-release containing all of the DLC for the same price as the original game, which I ended up also buying since the game is pretty good. I just regret that I now own two copies of the same game. Looks good on my shelf, though, so that's something.