I was recently inspired by Night of the Full Moon on the google play store. A good game for android that doesn't have ads plastered everywhere and doesn't try to trick you into spending money on silly microtransactions. Heck, you don't even have to constantly "log into the servers" each time you play it. Ofc it's not all free goodness, as there are "classes" locked behind a dlc I'll proly end up getting, but it's a good deck building game with surprising attention to detail. First time I played it, I ended up only sleeping a few hours that night because I was sucked in, and it was a work day the next day! anyone else come across one of these wonders hidden within the rubbish pit that is the mobile "stores"?
I like Dragon Mania Legend. The special events where you can collect special dragons is more like a chore but that's part of the business deal of the game to force the players to buy gems. Watching ads has rewards and buying gems or any other stuffs on their store is simply for the sake if you're too lazy or too busy to invest time playing aka doing the chore-like activities.
Pixel Dungeon. There is a lot of clones of it too, because it is an open source free software. Each clone adds some different stuff, but the original one is also good. It is the best rogue-like for android. (It means every time you start a game, map is randomly generated and each time you die you lose everything and the map is reset. Though there was extra life items in the later levels if I remember correctly.)
i have over 1000 hours in YU-GI-OH Duel Links, i did spend 10 € and bought 2 decks but you can get gems easy by doing the missions to buy cards for a good deck without spending money
Azur Lane -Dedicated Developers -No microtransactions that affect game, In fact they are useless -Nice events and updates -No units hidden behind a pay wall -Zero ADDs
Zenonia, a bit tough, but nonetheless a good game (all from 1 to 5 are good, S ruined it in my opinion)
ARPGs? Djinn Caster - Kemco Game. Its really good. Any of the Zenonia Titles if you haven't. Any of the Inotia Titles if you haven't. Any NDS games LOL or not.
Ever heard of 11bits studio? Yeah, those guys with Forst Punk... some of their game was ported on Android for you to play. Specificly, anomaly series. Those series is the pride & original ideas of the studio & exactly the things that keep me check out their stuff. Anomaly series is a full offline AAA games from them. It'll jolt your brain to find the best tactics & formation on-the-fly to get your squad of Armored Vehicles pass enemies defense line.Fancy how all of this turns out. They aalo the first introduce Tower Offense genre to the game market. :3