It’s rarely a good idea to give an ultimatum. Obviously state your concerns. Set some boundaries on yourself. If you’re at your breaking point, just leave.
Ultimatums just build resentment even if they choose you. They should want to pick you over video games. It’s just a short term fix otherwise.
Gamers are their own worst enemy.
Remember the Modern Warfare 2 debacle? Those who boycotted it ended up playing.