You are, but under certain conditions.
Since we've had a lot of problems with game servers in the past, we will accept your game server under these conditions:
1. You're not running illegal software on it.
2. You will do everything to prevent DDoS attacks.
If you violate these rules or a DDoS attack is headed towards your VPS we will take it down directly without warning. As long as you are ok with this, you're allowed to run a game server on the Tilaa platform.