Hello! I believe that a phone and a gaming gadget should be two separate devices. Here's why:
If you play on the phone, it quickly drains the battery (in some cases you may not even finish playing the game), and this is a problem, for some time there is no connection or game, and calls / notifications can be distracting.
If you want mobility - there is an excellent Nintendo Switch console, you can play with it not only at home, but also in transport, etc., you get 2 in 1. Recommended!
In general, there are few full-fledged interesting games for android. I am not considering 2D games. BUT! On androids there are a lot of different projects geared towards online. If you love online Korean RPGs, you can take this smart one.
But if we talk about individual games of a serious class, that is, GTA clones, similarity to the red grandfather revolver (not to be confused with redemption), CoD clones, there will be an independent assassin clone about pirates, but better, something like ancharted, animus is something like dark souls. But such crumbs in which there will be - the plot (at least some), the rudiments of hardcore and good gameplay - will have to look for a very long time in the ocean of casual and ports. There are also racing simulators and everything is not as bad with them as with slashers, RPGs, shooters, but this is a topic for a whole article.