If only there are exciting games that can work on cheap smartphones, I would probably be playing often off those games. It's risky to install those games on the phone because it may also compromise the other crypto wallets.
Gaming companies will need to adapt to the new trends otherwise they will be left behind. Sony has to also evolve, and probably create thier blockchain games as well. If DOTA will be on the blockchain, I guess they will need tokens too.
Are you sure you are looking the right places? Because there are many play to earn games that's running on smartphones, there are some that are less graphically demanding too, you can try to look into Games For a Living (GFAL), this is a new gaming project and it's capable to challenge GALA games, the team are from EA games and other popular game developers still very new, and they have two games up and running, one is Elemental Raiders, it can run on phones.
https://coinmarketcap.com/currencies/games-for-a-living/