Zero Synapse

A turn-based card roguelike where you fuse and refine your deck between fights. Choose your path, face off against Humans or Robots, and build a deck no other run will look like.

NULL wakes up in a fractured digital world, where every enemy you defeat leaves behind a fragment of what they were — a memory, an emotion, a last thought. Collect them, piece together what happened here, and cut your way toward whatever's left at the end.

A deck that never sits still
Zero Synapse doesn't just hand you new cards — it lets you fuse them. Combine two or three effects into a single card and discover combos that completely change how that card plays (100+ possible combinations). Refine what you've already got to make it stronger, with the risk/reward of a deck that grows more powerful and harder to manage at the same time.

Every run, a different map
Push through a map generated fresh each run: choose between fights, fusion, the shop, or upgrades for NULL, knowing every choice closes off other paths. Each zone ends in a Mini Boss — and beating one permanently unlocks a fragment of the real story behind all of this.

Human or Robot — never both
Each run decides, once, which faction you'll be fighting. Human and Robot enemies share archetypes but behave differently, so no run ever feels quite like the last one.

The practical stuff 

— Free (pay what you want if you liked it) 

— Windows, for now 

— Full Spanish and English, switch anytime 

— This is a demo: the first slice of a bigger game. If something breaks or something clicks, tell me — it genuinely helps.