There was a Nintendo DS game back in the day called Brain Age that claimed to be based on studies of neuroplasticity and all sorts of stuff, and they claimed that playing their brain-training mini games regularly would reduce your brain’s “cognitive age.”

I don’t think it was all complete bullshit, but later studies showed that the claims were overblown and all that was really happening is that you were training yourself to play the games better, just like would happen with any other game, so the cognitive age aspect was basically marketing bunk.