Outside of emulators and other similar apps, there are some games that have decent mobile ports. Some of the good ones I know of are:
Lego Star wars: the Complete Saga, which as far as I can tell, seems mostly identical to at least most of the other versions but it lacks all of the co-op/multiplayer components. I did also see some minor graphical glitches but they didn’t effect gameplay.
The 3D remake of Final fantasy 3. It seems identical to the PSP version but it’s obviously running at a higher resolution and possibly a higher frame rate as well.
Bloons TD 5, other users have mentioned 6 but 5 is also good too.
HamSandwich, which is not available through the Google Play Store, so you may soon be stuck with the browser version when Google’s changes to side loading take effect. Also, I recommend using either a keyboard or a controller, as the touchscreen controls are not that good.
The Enchanted Cave 2, the first one is also pretty good too but 2 has a lot more content and is a much better game all around.
I know that a lot of people have issues with games that have MTX, but I will defend these games if they are actually good and I can play them without feeling like I’m being force to put money in. Here are some of the games I can remember:
Honkai Impact 3rd, I haven’t completed the story yet but I’ve played up to the end of chapter 28 of part 1 and I haven’t had to put a single cent into the game. My only issue with this game is that, while the game does have keyboard support and the keyboard controls are decent, it doesn’t have controller support for some reason.
Bloons Monkey City, this game is basically just Bloons TD 5 but with a city building mechanic and some online components.
The Walking Zombie 2: Shooter. This ones a bit weird but I’ve been playing this occasionally. It’s a pretty decent FPS that takes at least some inspiration from the Fallout games. It’s not a masterpiece by any means but it still seems worth mentioning. I just wish it had keyboard and mouse support.
I’m not sure if it’s what you are looking for but I know that some energy drink manufactures offer their flavors in the form of hydration drinks.