Hexic HD is very addictive. I never thought I'd use the Arcade, but because this was preloaded, I love it!
You only get about 200 achievment points, but achieving them is fun and makes you want to play more. I forgot how fun those old school SuperNintendo games where, like Tetris and Dr. Mario.
Games like this should be more popular because it actually requires you to think, instead of pointing and shooting, which is usually what I'm doing. I would usually tell you to go buy this game since I gave it a good review, but instead all you have to do is turn your 360 on and find it. Trust me, it's worth it, and it's free...so you have no excuse to not play this game.