Heckabomb offers up twin-stick shooting thrills for PC users and usually sets you back $6 on Steam. To get a Steam key, just go to the Indie Gala giveaway page and enter your e-mail address - users will be randomly chosen to get a Steam key for the game. If you aren't chosen, you can try again five minutes later - and if you never get a key, you can still buy the game while it's on sale on Steam for only $1.49. It's a pretty steep discount and has fairly good marks on Steam as well.