⚠️ Before you install: turn off these mods ⚠️

BiomePicker doesn't work together with other mods that build their own mountain. If any of these are switched on, BiomePicker quietly turns itself off and you play a normal run.

• PLL Library
• All Biomes / All Biomes In One
• True Final Ascent
• Terrain Randomiser
• Terrain Customiser
• Peak Workshop

Watch out for PLL Library: mod managers install it automatically along with some other mods, and it stays on even after you disable the mod that brought it. Check your list of installed mods for it.

How to turn a mod off in r2modman: go to Installed, click the mod and choose Disable. Then restart the game.

⚠️ Work in progress

Long runs and every biome order haven't all been played through yet. Tell us what breaks.

BiomePicker

Climb every biome in one run, in the order you pick. Shore, Tropics, Roots, Alpine, Mesa, Caldera, the Kiln, Gloom and the Citadel, one after another, and then the Peak. If you have Lost City or Sakura Sanctuary installed, they join the run too.

Picking the biomes

Walk up to the check-in kiosk at the airport as usual. Next to your boarding pass (above it, on narrower screens) you'll see the list of biomes:

• Tick a box to keep a biome, untick it to skip it.
• Use the arrows to change the order.
• ALL IN A ROW puts every installed biome back, in the normal order.
• The Shore is always the start and the Peak is always the finish.
• Caldera and the Kiln always come together, and so do Gloom and the Citadel. Each pair is one line in the list, played one right after the other, just like in a normal run.

The list is remembered for your next run.

Good to know

• Every biome is the real thing. Same campfires, weather, items, monsters and lighting as in a normal run.
• One mountain, no teleports. Every biome sits on top of the one before it. Light the campfire and climb on, just like in a normal run. With every biome in the list, the mountain gets about twice as high.
• Every biome ends at a campfire with a revive statue. If the Kiln or the Citadel isn't your last biome, you'll find that campfire on the summit.
• The Peak is always on top of a Kiln or a Citadel. If your list ends with another biome, the island's own Caldera and Kiln, or Gloom and Citadel, come last.
• Playing Ascent 8 or higher? The amulet statue that opens the way onward is on the Peak of your last biome.
• It's a long climb. Pack food.

Playing with friends

• Everyone needs BiomePicker, in the same version, and the same biome mods (Lost City, Sakura Sanctuary) if the host uses them.
• The host's list counts for everyone. Everybody else sees it next to their boarding pass but can't change it.
• If the host doesn't have BiomePicker, everyone plays a normal run.

How to install

1. Install r2modman or the Thunderstore Mod Manager and pick PEAK.
2. Search for BiomePicker and click Install.
3. Make sure none of the mods at the top of this page are switched on.
4. Click Start modded.

BiomePicker is a fan-made mod. It isn't made or endorsed by the makers of PEAK.

Changelog

0.2.1 (2026-10-31)

• Fixed: a biome skipped when two scouts light a campfire together. When two players finish lighting the same campfire at almost the same moment, the game hears "lit" twice. A normal run ignores the second one, but BiomePicker took it as the next campfire too and jumped a whole biome ahead (Shore straight to the Tropics, with the Lost City missing in between). Now every campfire moves the run on once, as in a normal run.
• Fixed: "Lost City is off" on screen with Lost City 0.6.3 or newer. It told you to disable BiomePicker, but the Lost City was in your run all along. BiomePicker plays the city as one of its biomes, so that notice no longer shows.

0.2.0 (2026-10-24)

First release.

• Climb every biome in one run, in the order you pick. Shore, Tropics, Roots, Alpine, Mesa, Caldera, the Kiln, Gloom and the Citadel, one after another, then the Peak. Lost City and Sakura Sanctuary join the run when they are installed.
• Pick the biomes at the airport. The list sits next to your boarding pass (above it on narrower screens): tick a biome to keep it, use the arrows to change the order. Caldera and the Kiln, and Gloom and the Citadel, always come as a pair. The host's list counts for everyone.
• One mountain, no teleports. Every biome sits on top of the one before it; light the campfire and climb on.
• Every biome is the real thing: its own weather, hazards, sky, sounds, items and traps, as in a normal run.
• Every biome ends at a campfire with a revive statue. As in a normal run, it brings back fallen scouts, or gives you an item when nobody needs reviving. If the Kiln or the Citadel isn't your last biome, the campfire stands in the middle of its summit platform.
• The Peak and the Nadir work as usual. Light a flare on the last Peak to call the helicopter; on Ascent 8 and up the amulet statue on the last Peak leads to the Nadir.