OnlineCoopBeta

v0.1.1·Updated 2026-08-14

Experimental Steam online co-op beta for Skul: The Hero Slayer. Controls: F6 invite, F7 sync, F8 apply host stage, F9 disconnect.

About this mod Author’s original text

Online Co-op Beta v0.1

Experimental Steam online co-op for Skul: The Hero Slayer.

What this beta includes

  • Steam lobby invite and two-player connection
  • Independent player positions, skull loadouts, inventories, and visual effects
  • Host-authoritative stage transitions, seed synchronization, monster state, HP, death, and targeting
  • Shared world-drop replication and two-player chest rewards

Requirements

  • Both players need this exact mod version.
  • BepInExPack_Skul is installed automatically by r2modman.
  • Launch Skul using Start modded in r2modman.

Controls

  • F6: Create/open Steam invite lobby
  • F7: Request/send stage synchronization
  • F8: Apply a pending host stage
  • F9: Disconnect from the lobby

Important beta notice

This is a work-in-progress multiplayer mod for a game that was built for single-player. Back up saves before testing, keep both clients on the same version, and report reproducible issues with the BepInEx log.

This mod is unofficial and is not affiliated with SouthPAW Games or NEOWIZ.

Install & use Install: follow the bundled instructions

  1. Unzip the archive from playbuff and read the bundled readme / instructions first.
  2. Most mods rely on the game's mod loader — the usual route is a community mod manager (such as r2modman): pick this game, install, and it handles the loader and dependencies.
  3. For a manual install, put the mod files into the matching Mod / plugins folder inside the game directory.
  4. Launch the game to confirm it loaded; mods with listed dependencies need those installed as well.

Install locations vary a lot between mods — the bundled readme is the most reliable guide.

Dependencies

Install these first, or the mod will not work:

BepInEx-BepInExPack_Skul

File & checksum

Filename
OnlineCoopBeta-0.1.1.zip
File size
234.2 KiB