For Warlight, it was WL. For Warzone, it was WZ. War.app could thus be abbreviated WA, however WhatsApp is also abbreviated WA, which is annoying.
Another suggestion, made twice in this thread (
https://war.app/Forum/875496-pronouncing-warapp) is WAP. However a notorious rapper Meghan Thee Stallion released a song called "Wet Ass Pussy", abbreviated WAP, some years ago, so that abbreviation is suspect - especially considering War.app's terms of service prohibiting "obscene, offensive, or pornographic material".
Please help me. I need an abbreviation for the game.