Duel! PenGUiN

Player 1 moves with WASD, fire with F, Aim up with Q, aim down with E. Player 2 moves with Keypad 8456, fire with /, Aim up with 7, aim down with 9. In the beginning, there was GUN, and with that power civilization flourished, but now, in a world where GUN is held by penguin, they must fight for supremacy. Diplomacy has failed, and you and someone else must fight with GUN.