I play a lot of games with my 10yr old daughter. Here are some of what we liked: -Any lego game(there are shooting many and they often go on sale) -trine series, much more puzzle -sackboy a big adventure -brothers a tale of two sons -it takes two -portal 2 -degrees of separation -putty pals -ibb and obb -toodee and topdee -bleep bloop -battle block theater -chariot -pikunuku

We also loved going through the monkey island games. They are not mumtiplayer but they are slow point and click games that we bounced ideas off one another.