Abyssus multiplayer requires cooperation, but technical hiccups can block invite and join features. Common issues include:

• Missing session buttons
• Failed lobby creation
• Crashes triggered by Steam overlay interactions

Most problems stem from server instability, network conflicts, or version incompatibilities.

Why Multiplayer Fails in Abyssus

🔴 Server Outages

Multiplayer features disappear entirely during server downtime. If invites worked earlier but fail now, this is often the cause.

🛡️ Strict NAT & Firewalls

Abyssus uses P2P connections. Strict NAT types or blocked ports (UDP 27015-27030) prevent player linking.

💥 Steam Overlay Glitches

Some players experience crashes when attempting invites through the Steam overlay.

📁 Version Conflicts

If your game differs from your friend’s version by even one patch, multiplayer options vanish.

Fix Abyssus Multiplayer Issues

• Confirm server status: Check official channels before troubleshooting further.

• Full restart: Close Abyssus and Steam, then relaunch both.

• Verify game files: Steam → Library → Right-click Abyssus → Properties → Verify Integrity.

• Public password lobby workaround: Host a public session, set a password, and share details externally (Discord, SMS).

• Optimize NAT: Use wired Ethernet, enable UPnP, or manually forward ports.

• Synchronize versions: Ensure all players have installed the latest update.

FAQ

Why does Abyssus multiplayer fail post-update?

Patches sometimes reset network configurations or temporarily break server connections.

Can I bypass Steam invites entirely?

Yes. Use the in-game lobby browser and filter for your friend’s password-protected session.

Does antivirus software interfere?

Potentially. Add Abyssus and Steam to your firewall’s allowed list if sessions drop unexpectedly.

Is crossplay supported?

No. Abyssus currently only allows same-platform multiplayer (PC with PC, console with console).

Do save files affect co-op?

No, but all players must complete the tutorial before accessing multiplayer.