Barotrauma Home & Harbor expansion adds base-building, new faction December 2
The submarine simulator's paid expansion introduces player-owned outposts with research trees and workshops, alongside a new high-tech faction called The Descendants, launching simultaneously on Linux and Steam Deck.
Summary
FakeFish and Undertow Games have announced the Home & Harbor expansion for Barotrauma, their cooperative submarine simulator set beneath the ice of Jupiter's moon Europa. The add-on, releasing December 2, 2026 on Linux, Steam Deck, Mac, and Windows via Steam, centers on persistent base-building: crews can acquire outposts through story events or force, then expand them with new rooms, workshops, and research trees that tie surface life to submarine expeditions.
A new faction called The Descendants brings additional lore, weapons, submarines, and narrative content exploring Europa's history and attempts to re-establish contact with Earth. The expansion also introduces dynamic NPC faction behavior, with groups raiding enemy outposts or trading with allies. A free content update will accompany the paid DLC, adding story elements and gameplay features for all players regardless of purchase.
Expansion mechanics and Linux platform details
- Base-building system: Players gain outposts through narrative events or NPC combat, then manage expansion via room construction, aesthetic customization, and dweller management.
- Research and workshops: New research trees and workshop facilities create progression loops linking submarine missions to base development, intended to add stakes to long expeditions.
- New faction content: The Descendants faction introduces high-tech equipment, additional submarines, firearms, and lore expanding the game's narrative scope.
- Dynamic world simulation: Existing NPC factions gain behaviors to raid hostile outposts or trade with friendly bases, creating emergent territorial conflict.
- Platform parity: The December 2 launch includes Linux and Steam Deck alongside Windows and Mac, though specific Proton compatibility layer details and Steam Deck Verified status remain unconfirmed.
Why it matters
Simultaneous Linux and Steam Deck releases for major game expansions remain notable in the open-gaming landscape, demonstrating continued commercial viability for native or Proton-compatible titles. The inclusion of Steam Deck in the launch platform list without explicit Verified status highlights the ongoing need for Valve's compatibility program to provide clear guidance for handheld Linux gamers evaluating purchases.
Original reference: linuxgameconsortium.com →