[Roanon]

Using normal game rules to your advantage is not gamey, unless you are exploiting an obvious bug. A few things are widely considered unwanted, and should be regulated in the game setup - easiest way to do to avoid misunderstandings and discussions like this.

But there is a clear line crossed if you totally stop playing for yourself, and only participate to give everything you have to another player. This is nearly the same as if someone would join a game twice unter two different names, and THIS is clearly not "gamey" but plain and simple cheating.