...basically no. Dual n-back was thought to be the only thing that worked, but even that now looks non-transferrable. (Gwern is great on this topic.) For young

...basically no. Dual n-back was thought to be the only thing that worked, but even that now looks non-transferrable. (Gwern is great on this topic.) For young, healthy adults, I do not know of any brain exercise capable of directly raising IQ or its analogues. You might, maybe, be able to boost neurogenesis. Exercise is a decent candidate for that, and I don't know the situation with drugs there. But I don't know of games that do it. Realistically, you've got a few options. Your idea, spaced repetition of useful stuff, is great. Practicing memory tricks like mind palaces can improve your long-term memory on arbitrary facts. Picking up new topics dissimilar to the ones you know probably helps synthesis. Lots of things can maybe delay dementia. Meditation can improve focus and alertness. All of those are worthwhile. The top-line, raise basic IQ stuff? To my knowledge doesn't exist.