i know this isnt a oc but i wanted to ask

Well, studio was the first. Then world. THEN life and club.

Counting actual Gacha games there's 4

Are we talking Gacha games or games produced by lunime?

This is all the games, the top was removed in play store but I can recovered and cannot play in newer device, and some lost like chibion and xkour but there is a video in YouTube say that the oldest game

Depends