Adventure Invaders is a graphical hack of the game (it plays exactly the same as the original 2600 version), just having changed game sprites, as the invaders were made into various elements from the Atari 2600 game Adventure, as the laser base was made into the square adventurer of the game, the bunkers were made into the bridge (which is the only minor gameplay change that players can shoot through the gaps in the bridges), the invaders were made into the key, bat, magnet, the sword, a castle gate, and a dragon found in the game, and the Command Alien Ship is now the chalice from the game.