http://store.steampowered.com/app/105600/ http://www.terrariaonline.com/index.php love how they made 500$k ~ 1000$k in 24 hours.
As sooon as I saw yogscast playing this and various other videos I thought this was what the developers were thinking. "Take a well known gaming format over the last year. Go retro 2 (hey everyone loves cartoon 2d graphics andcits easier to program). Add more stuff that's pointless (everyone loves more stuff). Add way to many enemies to cover the fact there's not much you can do. Send free copies to YouTube broadcasters to get promotion and watch those sappy viewers buy it. Do a suprise release and do shock smiley faces as money rolls in."