Play Sirius Online

Summary

Sirius is a long‑lost Atari 7800 prototype that finally resurfaced thanks to a handful of dedicated hobbyists. The game feels like a love letter to classic horizontal shooters such as Gradius and R‑Type, offering four distinct stages each capped by a memorable boss. Its graphics push the 7800’s limits, holding its own against contemporary NES and Master System titles, while the dual‑difficulty switch lets you choose between a more forgiving or a brutally hard experience. Power‑ups range from a ghost ship that mirrors your fire to rapid‑fire and spread‑fire upgrades, and you can even stock an extra of each for a safety net after a death. Though the original cartridge was notoriously unstable, the recovered source code now runs smoothly on stock hardware, giving modern collectors a rare glimpse of what could have been a standout addition to the 7800 library.