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Phantoms Deep PlaytestEventsUnterseeboot Playtest
Major update

Unterseeboot Playtest

Phantoms Deep Playtest · published 22 Apr 2026, 23:41 UTC · build 22912848

All eventsPlayers around this dateRead on Steam

Playtest Announcement

Welcome to the first playtest. This build is a work in progress, developed by a solo developer, so expect rough edges and placeholder visuals.

Please post all feedback directly in this thread.

What to expect:

  • Use sonar to detect anomalies and investigate interesting sonar signatures.

  • Character and vehicle models are placeholders and do not represent final designs. The finished game will not include U-boats or destroyers.

  • The playtest includes a few enemy ships, resupply docks, and underwater structures with moon-pools.

  • Voice audio is active in multiplayer, both distance-based and via intercom.

  • A First Mate is present (currently a grey rectangle). They will monitor the reactor and execute commands issued from the periscope.

  • Do not go topside while underwater and moving, or you may become stranded.

  • You cannot die in this build, but you can run out of options. Use Shift + Tab to quit and restart if needed.

  • Weapon rigging is currently broken. The pistol is ineffective, and while the pipe can deal damage, it is not properly set up.

Feedback requested on:

  • Performance issues

  • Multiplayer functionality

  • Sense of scale

  • Anything else that stands out

Thanks for diving in and helping shape the experience.

More from Phantoms Deep Playtest

Other announcements

All events
In-game event17 Aug 2026Dev Update: Controls, Inventory, Equipment, and Multiplayer.Sensitivity and Controls The main goal has been to make sensitivity adjustments behave consistently instead of having individual control systems effectively decide their own movement speed. This should make it easier to find settings that feel comfortable whether you are moving around the submarine, aiming a weapon, or operating one of the ship's stations. Inventory Improvements The inventory i…Phantoms Deep PlaytestGame update7 Aug 2026Melee Improvements -Phase 1Phantoms Deep Playtest Update: Melee Improvements This build focuses primarily on improvements to the melee combat system. Melee System Several changes have been made to melee combat and enemy reactions: * Improved melee hit handling. * Improved blocking behavior. * Improved reactions when characters are struck. * Added additional support for enemies and other objects taking melee damage. * Gen…Game update4 Jul 2026Damage Control UpdateCaptains, This update adds new consequences for submarine damage. Your boat is no longer just taking numbers on a gauge. Damage now affects performance and survival. As the sub takes damage, its top speed is reduced. Heavy damage can also cause the boat to sink, forcing you to deal with the problem before the deep claims more than paint and rivets. To recover from flooding damage, players can n…