Opcode Arena

Opcode Arena is a programming game for Android: write 8-bit firmware for your combat bot and fight it in a deterministic 20x20 arena. Same code, same fight — down to the last tick.

Share fights as challenge codes: copy an RF1- code, paste it on another phone, and replay the exact same battle. Build a bot, challenge a friend, send the code back.

Both versions on Google Play:

Opcode Arena (free) — editor, assembler, five arenas, challenge codes. https://play.google.com/store/apps/details?id=robofight.android

Opcode Arena: The Circuit (paid, one-time €1.99) — everything in the free app plus Circuit Arena Packs: a new arena for every fight, derived from the fight's own seed. https://play.google.com/store/apps/details?id=robofight.android.pro

No ads. No accounts. No tracking.