Crysis Wars game server at 76.30.215.181:64100

I can scan it successfully with HLSW. Is there a specific port that needs to be opened for GameTracker to scan?

I am not able to scan this server on HLSW. If you are scanning it from within the network, you most likely will not have problems scanning it.

Yes you would need to have the game port opened so it can be scanned.

It seems as though HLSW can only see the server when there are players in it for some reason. Could this be why GameTracker is not able to scan it?

If you can add the server when players are in it, then yes it should be the reason. I have not heard of another user having that same issue.

HLSW was last able to see 76.30.215.181:64100 1 day 9 hours ago. There are players in it now, but it is not showing up on HSLW or GameTracker.

The IP is static, but the server is on a home network. Could this be an issue?

If you have open the TCP & UDP for the ports, it should be fine. If you have both a router and firewall software, you may have to open both. You could also try temporarily disabling your firewall to see if there is a misconfiguration there.