AI-generated editorial illustration; not a documentary photograph.
Cairn's delayed On the Trail: Deep Water DLC is now scheduled for October 29, 2026. Announced during the PC Gaming Show Tokyo Direct, the free expansion will add three climbing locations, another playable character and a free-roam mode to the survival climbing game.
Three New Climbing Areas
Deep Water introduces the cliffs of Haken and Ruka, where routes extend across overhangs above water. Falling into the water carries no consequences, giving players a less punishing setting for attempting difficult moves and experimenting with routes.
The third location is the Lamu climbing gym. It provides a more controlled place to practice the game's climbing systems before tackling exposed mountain routes, expanding the DLC beyond its two waterside environments.
Marco and Free Roam
Players will also be able to climb as Marco, whose style differs from existing protagonist Aava's. Deep Water's new free-roam mode supports both characters and allows saves to be reloaded on the mountain, making it easier to practice individual sections or explore alternative paths.
Those additions broaden Cairn's core loop of planning routes and managing a climber's movement. The lower-risk water sections, gym and reloadable mountain saves should particularly suit players who want space to learn or refine techniques without committing to a complete ascent each time.
First in a Planned Series
Deep Water is described as the first in a planned series of free On the Trail expansions. The source does not provide release dates or content details for the later additions, so only the October 29 availability of Deep Water has been specified.
The base game is also discounted by 20% on Steam through September 26, 2026. The report mentions Steam but does not specify availability for the DLC on any other platform.

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