Can't Play Online Games (that aren't even cracked)

[Rover]

So, I recently modified my Steam with SteamUp!. It works great, except one simple thing. When I try to go on online games that aren't cracked like Realm Of The Mad God, it doesn't work. It simply says it can't connect to the servers. Is there any work around? I want to use SteamUp! to get free games but I still want to be able to go online on games that I've paid for. Any help would be MUCH appreciated.

 

[FSOwner]

ROTMG actually checks to see if you have a valid Steam account on launching which is probably why it won't work for you. But generally applying a crack to Steam will stop all the legit games working anyway. Is That the only game that doesn't work?