You must save the “Big Castle” from annihilation. Survivor+ is like solo mode, except player 1 (red) is not a defender. Instead he can summon additional baddies to affect gameplay. This mode is still in beta. North v. South is a team based competition mode. See who can make who lose first! You can attack the otherside in this mode. Like Survivor+ this mode is in beta. There are 30 levels, 11 towers types, 3 unique heros, upgrades, tech, and more!!!