XENOCIDE PROTOCOL
Top-down bullet hell roguelite — 15 classes, 20 weapons, 4 merciless bosses. Build your loadout, survive 20 waves of alien hordes, and master weapon synergies that flip the run. Every run is different. Every death is a lesson.

Mixed · 97 reviews
69% positive (67 / 97)










What if you could enter an object in a level and find a level inside of it? What if you could enter an object in that level and find another level inside of that?
Released
May 14, 2011
Price
Platforms
macOS · Windows
Developer
Publisher
Last sync
September 25, 2026
Inside a Star-filled Sky is an infinite, recursive, tactical shooter by award-winning designer Jason Rohrer (Passage, Between). What if you could enter an object in a level and find a level inside of it? What if you could enter an object in that level and find another level inside of that?
What if you could change an enemy or a power-up from the inside? What if you could enter and change yourself? What if these levels inside levels inside levels went all the way down---and all the way up?
Inside a Star-filled Sky is a hard, procedurally-generated shmup built around this core concept.