Anything by Yiotro. . They’re all free, with no ads or microtransactions and no data transfer anywhere. It is surprising how little battery they eat up due to this. Most of them are some form of “popular game devolved a bit to make it play easy on a phone, including the ability to just bail at any moment”, i.e. Vodobanka is basically Doorkickers without the bells and whistles. Antiyoy is distilled Civ and has the same addiction loop of one more round.