Write Your Story Across the Stars
A deep real-time 4X sandbox of exploration, discovery, and civilization-building. Inspired by Aurora, shaped by you.
A living galaxy, captured from the game
Every frame below is real — no mockups, no renders. This is what playing Protostar looks like.
Protostar 4X is a deeply detailed real-time space strategy sandbox — explore uncharted systems, settle living worlds, and follow a species from its first launch to a thriving interstellar civilization. Inspired by the legendary Aurora, rebuilt from the ground up with a custom engine, browser-based UI, and a focus on moddability wherever practical.
A Living Galaxy to Discover
Thousands of systems to explore — some procedurally generated, others drawn from real stars via NASA's open data. Each one holds secrets to uncover and a story waiting to emerge.
Your Civilization, Always in Reach
Open multiple views across browsers — system, galaxy, economy, logs — all watching your empire breathe in real time, with fingertip access to every command via a quick command palette.
Shape It To Your Story
The core gameplay is itself a module. Add community flavor or go total conversion — the engine won’t limit your imagination.
Depth Without End
A custom engine built for the kind of granular detail that lets stories grow organically, session after session.