Download TIC-80 is a fantasy console that also has an android app.

Inside it you'll have access to tons of games made for that console.

I've been some weeks playing "Shadow over the twelve lands" on android TIC-80 and it has been a great experience.

It's all open source too!

Ignoring the arcade style preference: i like Cats are Liquid: A Better Place and Cats are Liquid: a Light in the Shadows

They are 2 platformers with abstract graphics, abilities and a sad(extremly confusing) story

Just passing by to say that with a little fiddling, you can get Morrowind running on your phone, touch screen controls and all if you don't have a gamepad.

Cultist Simulator

I've been playing half life using xash3D for this very reason. People are on multiplayer all the time, counter strike has players too. I'm really hoping to find people playing team fortress sometime.

You could get some minigame type games from fdroid. I have a tetris game and a 2048 game from fdroid. There's also Super Tux Kart if you want something 3D

Kingdom Rush has been fun and not needy. (The first one?)

Sky Wings is pretty fun. It's super arcadey, has different ships with different abilities and shooting styles, different modes and difficulties. I've put in quite a few hours over the years.

The Flow Free puzzle games are pretty fun imo. I have most of the different ones installed on my phone, and some years back I actually bought a bunch of the expansions for the base version so I have a ton of puzzles to go through.

Twenty is my go-to. Blockus clones are fun too, and there are a lot of game modes.

This Ars article turned me on to it. Maybe click through some of his other suggestions-

https://arstechnica.com/gaming/2015/05/why-twenty-is-my-latest-mobile-gaming-obsession/

Honor of Kings is pretty good. Just ignore all the contests. You always start at the same ability as everyone else.

My favorite is Time Surfer. The core mechanic is basically the same as Tiny Wings, but the theme, artwork, levels, etc are all very different. I especially enjoy the chiptunes!

Card crawl

Everyone in here sleeping on pocket city 1 and 2. 1 is free w/ads or 2.99 and 2 is 4.99

Puzzler / slight programming vibe: BaBa is you

I just want to kill some time

Pokemon sleep and take a nap

My favorite mobile games are

Don't starve

Dead Cells

Emulating old RPG games through Delta or Lemuroid

Retro Bowl - 1980s style american football game

Lapse and Lapse 2 - clones of the Reigns game

Plague inc

there’s a really good port of dodonpachi daioujou on the iphone app store, idk about android. sorcery is another good one, based on an old steve jackson gamebook

I got really hooked on Armory and Machine, there is an A&M2 but I've never played it.

Its the kind of game that only has a mobile version, it rewards you for coming back to it like any bad mobile game, but there are no ads, nothing to buy, and I don't think there is any data shared.

The premis is you are work on a machine, making it faster, better stronger, more automated, and more able to produce things. Things can be in turn, turned into items that let you travel and fight critters. The loot from the critters can be used to make your machine faster. Its all a vicious factorio-like loop, and show how fun these mobile mechanics can be when there is no company taking advantage of you.

Geometry Dash

So far, „sky“ is pretty nice

dungeon cards, shattered pixel dungeon, or just read manga

Shattered Pixel Dungeon Loop Hero Pirates Outlaws

I install a few others every now and again to try new things, but it's usually ad-driven / endless predatory MTX bullshit.

Balloon Fight is hilarious and a stomper

Wordscapes dont know if anyone said it

AAAAXY is an incredibly trippy puzzle platformer available on F-Droid.

Tyrian. 90's scrolling shooter ported over and mostly functional.

damn i miss the old mario party for N64, i been meaning to find a good alternative free version