Usually we say «jeu
de figurine».
Literally it's “model games” but it's really about Warhammer, Warmachine, and all the other games with model painting and all that.
Alternatively you can say « jouer aux pitou » but that's much more slang, and even less well-known than « jeu
de figurine » or « Warhammer ».
Automatically Appended Next Post: We write this : « Va te faire enculer connard».
Or, when in a hurry to surrender, just « Enculté ».
You can hear it in this video extract:
https://www.youtube.com/watch?v=EOxUWLl2HFs