Creeper World is like a real-time strategy and tower defense game. Unlike most games of this type, there is only one enemy and it can only be repelled rather than destroyed. The player must hold back a blue mass called the "Creeper", which has already destroyed most of humanity and is now attacking Odin City, humanity's last bastion. This is done by placing towers onto the battlefield which shoot at the Creeper. The main goal of the game is to connect the player's base to energy totems through the use of energy collectors and relays; doing so opens a jump gate which allows Odin City to teleport to a new planet and attempt to escape the Creeper again.