As I can see in this topic: https://forums.revor...ion-guide-bfme/
Right now, the T3AOnline launcher creates a thread in some weird fashion to kick off the game.dat that's not currently supported by Wine. I have tested this fairly extensively on Wine 4.5 and was unable to make it work. If you're reading this in the future, or if T3AOnline receives another update, it may be worth trying again, but for now it's not easily possible.
Is there a way around this in any way? If not, is there a place I can get more details on the issue? How much work would it be to fix this?