Voice Chat in Subnautica 2 Co-op
Short answer
Subnautica 2 has no built-in voice chat in Early Access. Use Discord (best for crossplay parties), Steam Voice (Steam-to-Steam only), or Xbox Party (Xbox + Xbox-app-on-PC). Disable your push-to-talk hotkey from conflicting with the game's flashlight (F) and ping (Middle Mouse) defaults.
Voice options
| Service | Best for | Limitation |
|---|---|---|
| Discord | Any platform mix (PC + Xbox) | Xbox users need a phone with the Discord app to bridge in. |
| Steam Voice | Steam-only parties | Doesn't work crossplay; lower audio quality than Discord. |
| Xbox Party Chat | Xbox console + Xbox-app-on-PC | PC must use the Xbox app, not Steam/Epic. |
| Mumble / TeamSpeak | Latency-sensitive groups | Self-hosted; overkill for 4 players. |
Set push-to-talk away from game keys
Default game uses F (flashlight), Middle Mouse (ping), V (knife/biomod 1), B (biomod 2). Avoid those for PTT. Common safe bindings: Mouse4, Mouse5, Caps Lock, or Right Alt.
Spatial audio considerations
Subnautica 2 has its own ambient soundscape that's part of the experience — sonar pings, Leviathan growls, hull creaks. Keep your voice chat output 5–10 dB below game output and you'll still hear the cues. Discord's Krisp noise suppression handles aquatic ambience well; it does not muffle game audio because Krisp runs on the mic side, not output.
FAQ
Does Subnautica 2 have in-game voice chat?
No, not in Early Access. Use Discord, Steam Voice, or Xbox Party.