It might not be the most popular game anymore, but Space Invaders is still the game to play when you’re bored and just have some time to kill. You can get one of those emulators and play the original game on your smartphone or tablet. Or you can get one of these Space Invaders keychains and whip it out whenever you want to play a game of Whack-an-Alien (or use one of the keys you’ve got hanging on it.)
This keychain features sound effects from Space Invaders and offers three levels of challenging, out-of-this-world fun. It’s available from ThinkGeek for $13.