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Some servers run custom mods (e.g., Bot Warfare, MW2R, Zombies). The server list will usually append [MOD] to the server name or show a small icon. If you join a modded server, IW4x will automatically download the required assets.
Ignore servers with a padlock icon unless you have the password (usually reserved for clans or private testing). iw4x server list
The #1 question: Can I get a virus from joining a server? Some servers run custom mods (e
Generally, no. IW4x has been hardened against the RCE (Remote Code Execution) exploits that plague the original Steam version. The client sandboxes downloads. However, exercise common sense: Usually 18 players (up from the original 12)
If you can see the servers but cannot join:
Usually 18 players (up from the original 12). Vibe: The authentic 2009 experience. No crazy mods, just Domination on Afghan and Demolition on Scrapyard. These servers are always full.
This is the most underutilized feature. When you find a server with good admins, low ping, and fun players: