I don't enjoy RPGs normally, but Kingdom Come was incredible and I plan to replay it a couple more times.
Any kinds of strategy game that you can enjoy is good because it works your brain. Grand strategy games are based if you can get past the learning curve. Total War games are also based because large scale war campaigns are extremely white.
then of course basic stuff like Chess. If you want to learn chess, download the
chess.com app and start practicing. It has a ton of training exercises and practice tools that you can use. I always pull it out on the toilet and do the eye training stuff.