I'm looking for completely free and open source Android games. By open source, I mean the engine, assets (I'll allow this to be free and not open source provided that there isn't any major strings attached), and games should be open source as defined by The Open Source Definition (unofficial games, mods, and total conversions made with a free and open source engines [but with the official games not being free] are okay [provided that the assets are free or free replacement assets are used {like FreeDOOM}]).
There are lots of examples on github:https://github.com/pcqpcq/open-source-android-apps/blob/master/categories/game.md