- Forces Arcade Mode on - no Grand Stick III / DIP switches required.
- The title screen shows "ARCADE PAPRIUM" with the Insert Coin / credits display instead of the normal Original/Arcade menu.
- Pressing the Mode button (6-button pad, port 1) adds one credit, using the game's own real credit-increment logic.
Arcade Mode's main gameplay difference is friendly fire being enabled. The main goal of this ROM hack is to actually play the game on a real arcade cabinet, by mapping the Mode button to a coin input (coin door / coin mech), so Arcade Mode becomes usable as intended.
- paprium_arcade.ips - the patch itself
- technical_breakdown.md - full technical writeup (disassembly, addresses, how it was found)