Protocol Aegirum

Protocol Aegirum is a turn-based strategy game that combines chess with roguelike tension. You command a fleet in a simulation that humanity has tried and failed to break; each defeat sends you back to the beginning. As you advance, the story reveals more about the simulation and who is on the other side.

Fleet and battles

Your six ship classes, from the Gunboat to the Dreadnought, each move like a chess piece. The game uses chess rules including castling, en passant and promotion, and you must protect your Capital Ship. Before each battle, you deploy your ships, then face an enemy that uses Stockfish, tuned across six difficulty levels from Cadet to Warden of the Void.

Sectors and choices

The campaign spans five sectors, each with a route map generated for that run. You choose your route through battles, events, markets and reinforcements. Victories earn Synthite, which you can spend on ships and doctrines.

Doctrines and modes

Doctrines change how you approach the campaign. They can let you undo a fatal move by your Capital Ship, start each sector with extra ships, earn more resources, or win as soon as the enemy Capital Ship is left unprotected. Standard mode offers a classic chess game against Stockfish, with your fleet as the pieces.

Additional content

The game includes 27 Steam achievements and space music by Stellardrone.