The website "https://www.masswerk.at/spacewar/index.html" hosts an online emulation of the classic 1962 video game "Spacewar!", one of the earliest digital computer games. Developed by Steve Russell and others at MIT, Spacewar! pits two spaceships against each other in a battle influenced by the gravity of a central star. The site allows visitors to play this pioneering game directly in their web browsers, offering a nostalgic experience that showcases an important piece of video game history. Additionally, it provides background information on the game's development and its significance in the evolution of video gaming.