Comment by last_one_in

Spacewar! (there's an exclamation mark in the name) inspired me to write a modern one player version with gameplay more like the amazing (and free) Waves (https://store.steampowered.com/app/107600/Waves/). It bombed and sold about 9 copies! Here's the Steam page: https://store.steampowered.com/app/2434510/Gravity_Waves/