PEAK Split-Screen

What it does

PEAK is a co-op climbing game you normally play online. This mod adds the other way: a second player on the same PC, on the bottom half of the screen, with their own controller. Pick Play Solo, player 2 holds START for a second, and they're in.

Player 2 isn't a spectator. They get their own character, camera, HUD, inventory, backpack, emote wheel and pause menu, and it plays like two friends online: you can carry each other, revive each other at a statue, open each other's backpack and pull the thorns out of each other.

Two climbers, one screen

• Each player gets their own half: top and bottom by default, or side by side.
• Player 2 gets their own character, camera, HUD, inventory, backpack, emote wheel, pause menu and end-of-run report.
• Carrying, reviving, ghosts and the statue revive work between you, just like with online friends.
• Storms, heat, spores, traps and campfires work on both of you, with their own timers.
• Both players can be in their own menus at the same time. Pausing stops the game for both.

Player 2 is their own player

• Player 2 picks their own look with their own passport at the airport. It's saved for next time.
• Player 2 has their own controller settings: sensitivity, invert X and Y, field of view, head bob and jump-to-climb.
• On-screen buttons match each player's own controller: Xbox, PlayStation, Switch or Steam Deck.
• Campfire saves include player 2's items, so continuing a run gives them back.
• Player 2 can leave from their pause menu and come back any time by holding START.

Good to know

• Split-screen works in Play Solo only. In an online room it switches off.
• One extra player, and player 2 needs a controller.
• Achievements and Steam stats count for player 1 only. It's player 1's Steam account.
• There's one set of ears: each sound plays at the volume of whichever player is nearer, and left and right follow player 1. Player 2's microphone is off.
• Graphics, audio and button rebinding are shared between the two players.

Requirements

Game

PEAK on Steam, Windows version

Windows

Windows 10 or 11, 64-bit

Controllers

One controller for player 2. Player 1 can use keyboard and mouse or a second controller.

Included

BepInEx 5.4.23.3 with HarmonyX and MonoMod, put in the game folder. Nothing else to install.

Admin rights

Not needed, unless your game folder is write-protected. Then the installer offers to restart as administrator.

Game mode

Play Solo (offline) only

Tested on

Steam build 26542162. The installer tells you if your game has updated since; most things usually keep working.

Screenshots

All shots in split-screen at 1920x1080. Player 1 is on top (or left), player 2 below (or right).

Install

1. Close PEAK.
2. Run the Setup.exe from the download button. If Windows says Windows protected your PC, click More info, then Run anyway. The installer isn't code-signed, so Windows doesn't know it yet.
3. It finds your Steam copy by itself. Click Install. If it can't find PEAK, click Change... and pick the folder with PEAK.exe in it (in Steam: right-click PEAK > Manage > Browse local files).
4. Start PEAK from Steam as usual and choose Play Solo.
5. Player 2 holds START on their controller for a second and joins on the bottom half of the screen.

Got an older version? Close PEAK, run the new Setup.exe and click Update to .... Player 2's look and settings are kept.

Uninstall

1. Close PEAK.
2. Run the Setup.exe again (download it here if you deleted it) and click Uninstall.
3. Confirm. PEAK is back to normal.

Your PEAK saves and settings aren't touched. Player 2's look, settings and campfire save are removed, because they live in the mod's own settings file. If no other BepInEx mods are left, BepInEx and its loader files go too.

Troubleshooting

Changelog

1. 1.1.2 Nov 10, 2026Current
   • First version published on this site.

Versions before 1.1.2 were only shared with friends and aren't published here.