Player 1 Controls [A] Rotate left [S] Rotate right [D] Thrust [F] Fire

Player 2 Controls [K] Rotate left [L] Rotate right [;] Thrust ['] Fire

The objective is to destroy the other player without falling into the gravity well of the star in the middle of the screen.
Click RUN to start.

Spacewar! was conceived in 1961 by Martin Graetz, Stephen Russell, and Wayne Wiitanen. It was first realized on the PDP-1 in 1962 by Stephen Russell, Peter Samson, Dan Edwards, and Martin Graetz, together with Alan Kotok, Steve Piner, and Robert A Saunders. Spacewar! is in the public domain, but this credit paragraph must accompany all distributed versions of the program.