There are lots of different games in Academy. You've got stuff like maths puzzles, memorising sounds or numbers, locating matched pairs. I think the problem is that the games really aren't representative of the areas they espouse to test (so you don't feel in the "think" games that your brain is necessarily being specifically tested in that area). Also, the games tend to be americanised and provide erratic results (e.g. I got between half and full marks for all 5 categories on the few times that I've played, but there doesn't seem to be any rhyme or reason as to why there's such a big difference in my grades). Having said all of that, the games are generally quite fun, and if you accept that it's not going to test your maths/memory skills as rigorously as Brain Age, and just treat it like a game, I expect it could be a lot of fun multiplayer.