I MAED A GAM3 W1TH Z0MB1ES!!!1 costs a dollar. It says so right there in the incredibly catchy song  that accompanies your wholesale slaughter of zombies, worms, freaky-ass Smileys, and goo. Honestly, I would pay a dollar just for the song; the fact that there's a sweet twin-stick shooter attached to it is just a bonus.

Honorable Mention goes to The Secret of Monkey Island: Special Edition, because I expected it to cost at least fifteen. But it costs ten! Thanks, LucasArts; please keep it up.