Abyssus: Why You Cannot Connect To Friends, And What Actually Fixes It

Abyssus is a peer-to-peer game. Once you understand that, most of its friend-connection problems make sense. There is no central matchmaking server between you and your teammates when you play together. Your machine and their machines are trying to talk directly, and anything that gets in the way of that direct conversation — a router with strict NAT, a firewall, a slow ISP path — is exactly the kind of thing that breaks the connection.

That framing is worth having up front, because the standard advice for online games ("check the server status," "switch region") mostly does not apply here. Abyssus does not have servers to be down. What it has is your machine, your friends' machines, and the internet between all of you. When you cannot connect, one of those parts is the reason.

What The Failure Actually Looks Like

Abyssus friend connection problems have a distinctive set of symptoms:

• The "Join Game" button stays greyed out even though your friend is clearly in a lobby.
• Join attempts timeout after a long wait with no error.
• You get past the loading screen but disconnect from the lobby a few seconds later.
• One player in the group can join everyone; another cannot join anyone.
• Steam shows your friend online, but their game session does not appear.

Most of these look like Abyssus bugs but are actually peer-to-peer connection failures. The game is doing its job; the network is not letting the peers meet.

The NAT Problem

Every home router uses NAT to translate between your local IP address and the internet. Different routers implement NAT with different levels of strictness, and P2P games are extremely sensitive to that strictness.

Strict NAT is the version where your router only accepts return traffic for connections it initiated. That works fine for browsing and streaming. It breaks P2P game connection attempts, because those need an incoming connection from a peer, which the router has not seen before.

Moderate or open NAT is the version where the router is more permissive about accepting incoming connections after brief handshake exchanges. Games work.

If you and your friends have mixed NAT types — one open, one strict — your connection will fail in a predictable direction: the strict-NAT player will not be reachable, and the open-NAT player will look fine but cannot get through to them.

The practical fix for strict NAT is either enabling UPnP on your router (which many routers ship with off by default), manually forwarding the specific ports the game uses, or switching to a bridge-mode setup if you are behind a double-NAT (ISP router plus your own router). Each of these is a router-config change and cannot be done inside the game.

The Route Between You And Your Peers

When NAT is not the problem, the next layer down is the route between your ISP and your friend's ISP. On a good route, this is fast and stable. On a bad route, it is slow and jittery, and Abyssus's peer-to-peer connections can fail during the initial exchange even when both players' NAT is fine.

Cross-region friend groups feel this the most. If you are in Europe and your friends are in North America, the P2P route is thousands of kilometers long and passes through several ISPs, and each ISP's routing decisions affect stability. You do not control any of those decisions.

This is where GearUP is genuinely useful for P2P games, because it does not need a game server to route through — it optimizes the path between your machine and the other peer. Over 7,500 global nodes give it enough options to route around bad hops on any given ISP path. It works by identifying Abyssus traffic and moving only that traffic onto a healthier route, without touching your other apps.

Setup for Abyssus specifically: install GearUP, search for Abyssus, click Boost, launch the game. Whoever in your group is having the most trouble joining is the one who should install it first. Often only one member of the group needs it — usually the one on a stricter NAT or a worse ISP path — for the whole group's connection quality to improve.

Steam Sync Delays

A smaller category of failure comes from Steam itself, not the game. Steam's friend list, session status, and Rich Presence data can lag behind reality by 30 to 90 seconds, especially during Steam's own high-load periods. Your friend appears offline in-game when they are actually in a lobby, or vice versa.

The fix is not to keep clicking. Close Steam completely from the system tray, wait 20 seconds, and reopen. This flushes the local session state and forces a fresh sync with Steam's servers. It sounds like magic but it actually works for this specific problem.

Version Mismatches

Abyssus is in active development, and updates ship regularly. If you updated the game and your friend did not (or the other way around), your join attempt will fail silently. There is no clean "version mismatch" error most of the time — it just does not connect.

Have everyone in the group check for updates in Steam before playing. This is a boring habit but it removes an entire category of failure.

Firewall Fixes That Actually Apply

Windows Firewall almost always leaves Abyssus alone on default settings. Third-party antivirus is the more common source of problems. If you installed a security suite recently (Kaspersky, Norton, Bitdefender, etc.), it may have quietly added Abyssus to its "unknown application" list and is filtering the P2P traffic.

Temporarily disable third-party antivirus and try to join a friend. If it works, add Abyssus's executable to the antivirus's exception list before re-enabling.

Local Network Housekeeping

A few basic things help enough to mention:

Wired instead of Wi-Fi. P2P games are more punished by Wi-Fi jitter than server-based games, because there is no central server to smooth over irregularities.

Router reboot. Not superstition. Home routers accumulate small session and NAT-table issues over long uptime. A power cycle every couple of weeks resets it cleanly.

Bandwidth-heavy apps off. Anything else using your bandwidth reduces the reliability of a P2P handshake.

Router QoS. Some routers have a Quality of Service setting that prioritizes gaming traffic. It is worth enabling once and leaving alone.

Order To Try Things

1. Check that everyone is on the same game version.
2. Restart Steam fully to flush stale friend state.
3. Try wired connections and free up bandwidth.
4. Check NAT type and enable UPnP or forward ports if you are strict.
5. Disable third-party antivirus briefly to test.
6. If failures continue, use a route optimizer to fix the ISP-side path.

What Success Feels Like

Once all of this is set up correctly, joining an Abyssus session should be uneventful. You click Join, the lobby appears in a few seconds, and the load starts. Ping should be stable during play. Disconnects should be rare.

If your group still has problems after all of the above, the issue has narrowed to one specific player's setup, and that person is the one who should investigate further — usually with their ISP or their specific router. Group-wide P2P problems in Abyssus are rare; individual-player problems are common, and the fix is almost always on that individual's side.