Known Lag Problems
These problems are reported by real players. If your region or ISP is listed, a network optimizer is likely to help.
Southeast Asia / Oceania
100-250ms to EU/US Photon relays- Photon relay adds geographic distance penalty — SEA players may connect to EU or US relays if Photon auto-selection misconfigures
- Community reports: 120-200ms ping even with good internet from Southeast Asia
- Photon Voice quality degrades noticeably above 150ms
South America
100-200ms to EU/US Photon relays- Photon has a South America region (São Paulo) but may not be enabled for R.E.P.O.
- If routed to EU or US relays, latency from Brazil is typically 150-200ms
What players commonly report
- High ping for players outside EU/US due to Photon relay geography
- Physics objects jittering and snapping during sessions
- Host migration causing session disruption
- Voice chat desync at higher latencies
- Absence of official anti-cheat enabling griefing in public lobbies
How to Fix It
Try these first — they're free and solve the problem for most people.
01 Switch to a wired Ethernet connection
1. Plug a Cat5e or Cat6 Ethernet cable from your PC to your router 2. In Windows: Settings → Network & Internet → Wi-Fi → turn off Wi-Fi 3. Your PC switches to the wired connection automatically 4. Rejoin your R.E.P.O. session and check if physics jitter improves
WiFi introduces 5-30ms of unpredictable jitter. In Photon PUN with physics synchronization, jitter causes objects to snap and teleport on your screen. A wired connection is the cheapest fix for physics desync that isn't caused by the host.
02 Close background bandwidth consumers
1. Press Ctrl+Shift+Esc → Task Manager → Performance tab → Open Resource Monitor 2. Click Network tab — sort by 'Total (B/sec)' to find bandwidth-heavy processes 3. Common culprits: Windows Update (Settings → Update → Pause 7 days), torrents, OneDrive sync, cloud backups, Spotify, Discord video streams 4. Close or pause them before starting your R.E.P.O. session
R.E.P.O. with Photon Voice and physics sync has moderate but bursty bandwidth needs. Background downloads during active gameplay cause latency spikes to Photon relays, which appear as physics objects freezing and snapping.
General network tips (not R.E.P.O.-specific)
03 Check your ping using the in-game display
1. While in a game session, press Escape to open the menu 2. Look for a ping or latency indicator — R.E.P.O. displays connection quality in the lobby and session UI 3. Alternatively: open Task Manager (Ctrl+Shift+Esc), go to Performance → Open Resource Monitor → Network tab — find REPO.exe and observe bytes sent/received 4. For a more accurate test: use a Photon ping test tool at photonengine.com/en-US/sdks#realtime to measure your ping to each Photon region before launching
Confirms whether your physics desync and voice issues are network-related (high ping/jitter to Photon relay) or host-related (host player's connection or PC performance).
04 Let Photon auto-select your best region
1. When R.E.P.O. starts, Photon runs a region ping test automatically — let it complete before creating or joining a lobby 2. If you're experiencing consistently high ping: close the game, clear Photon's cached region preference by deleting PlayerPrefs (Win+R → regedit → HKCU\Software\semiwork\R.E.P.O. → delete PhotonBestRegion key if present) 3. Restart the game and let region selection run fresh 4. Create lobbies — Photon should now route you to the closest relay region
Photon's auto-region selection uses measured ping to pick the fastest relay. If the cached region is stale or incorrect, clearing it lets Photon reassign you correctly.
05 Host the lobby if you have the best connection
1. In Photon PUN, one player acts as the 'MasterClient' (room host) — their game state is the authority 2. The player with the lowest, most stable latency to the Photon relay should create the lobby 3. Coordinate with your group: whoever has the most stable wired connection or lowest ping should host 4. If the current host has poor connection and everyone is lagging, have them leave and a better-connected player recreate the lobby
In relay-based multiplayer with a host-authority model, the host's connection quality affects all players. A host with 200ms jittery connection makes physics unpredictable for everyone — host selection matters more than in dedicated-server games.
Regions with good connectivity
Players in these regions likely won't benefit much from a network optimizer.
- Western Europe — Photon EU relay in Amsterdam provides excellent coverage. Community confirms EU players experience good latency.
- North America — Photon US East (Washington D.C.) and US West (San José) both available. Community confirms good latency for NA players.
Still lagging? The problem is likely your ISP's routing to the game servers.
PingAim detects R.E.P.O. automatically
No manual config. PingAim identifies R.E.P.O. by process name and routes it through your fastest connection using a kernel-level WFP driver.