>>61816i have bought a controller similar to pic related, there is an app for it to adjust which parts of the screen are pressed in case the game offers support for touch only. the thing on top, used for fixing the phone, is removable on mine (and i recommend you to not use it, i felt like the phone can fall off it). pretty good for playing dead cells or castlevania symphony of the night.
but i think the best mobile games are puzzle ones, candy crush, chess, checkers, and similar. things like minecraft and free fire really doesn't play well with the screen (action games in general and anything that demands your attention non-stop), unless you connect a mouse and keyboard via bluetooth.
my major complaint with minecraft, besides that, is how heavy that game is. even today, a M62 has respectable specs, they aren't top of the line, but has annoying frame drops. i mean, it runs doom 3 smoothly through delta touch.
i believe that Plato does an excellent job in aggregating simple games that work well on the screen, but any game specific app does a better job at that particular game, e.g., chess (and honestly, i wish there were offline alternatives for this one with bots that are easier to beat).