Miniature Atari 2600 Games on Your Keychain

These miniature Atari 2600 joystick and paddle controllers function as both a keychain and a functional video game console. Certainly they’re a bit cumbersome as keychains, but you cannot deny the cool factor here.
I’ve seen differing information on which versions feature which games, but from what I can decipher, there are three versions, one with Asteroids and Millipede (joystick); and one with Yar’s Revenge and Centipede (joystick) and one with Breakout, Pong and Warlords (paddle).