Stargate, also known as Defender II, is a classic side-scrolling shooter game for the Atari 2600, released in 1984. Developed by Williams Electronics and ported by Atari, it's the sequel to the hit arcade game Defender. Players pilot a spaceship defending humanoids from alien abductions on a wraparound planetary landscape. With upgraded features like the stargate teleport, smart bombs, and invisible enemies, it provides a heightened challenge. The game's objective is to defeat waves of extraterrestrial threats while protecting the human population to score points, exemplifying the arcade-style shoot 'em up genre.