Sometimes, the issue isn't on your PC or the game server, but the "road" in between. Internet Service Providers (ISPs) sometimes have poor routing tables, sending your traffic on a long detour before it hits the game server. This extra time can cause a "timeout," which the game interprets as a connection failure.
Have a unique fix not listed here? Let us know in the comments below. Last updated: June 2026. deadside error code 4