Owner-approved X + Zero co-op playtest for Windows and Linux. This Windows package includes the regression fixes previously shipped in Linux-only Playtest4; the gameplay source is unchanged after the approved simultaneous-spawn test.
- Both characters arrive together, slightly side-by-side, at suitable stage/section/retry/portal spawns.
- Includes the qualified boss-door, survivor handoff, dash/effect ownership, bike, pause/dialogue, save/portrait, Lightning Web and train-background fixes.
- Two-player netplay lobby and separate local controller assignments on both platforms.
- Unified cameras and vertically stacked lifebars are defaults. Split cameras are experimental; Side by side HUD is available in Mods.
- Input display and diagnostic recording are enabled by default. Private development controls are disabled.
Download the Windows ZIP or Linux x86_64 AppImage below. Co-op requires your own original US disc, OpenGL and a fresh boot after changing mods. Use Playtest5 on both netplay peers. The AppImage requires glibc2.38 or newer.
Validation: 18/18 title checks passed on both platforms. Actual packaged Netplay and Player2 controller pages passed hidden launcher checks and image inspection. Package layout/seeding, Windows imports/archive integrity and matching production profile/room-offer checks passed. Your opening-stage spawn visual test passed.
Known issues: Split Mushroom elevator item29 remains unverified; real WAN gameplay, intermittent retry/menu netplay disconnects and broader Split performance remain open qualification/investigation areas. The original28 regression entries are qualified; this does not establish complete campaign coverage.