DS, aged 12, is desperate to have Halo, which has a PEGI rating of 16+, rated for violence. I know some of his friends have the game (friends whose parents I trust). He asked if he could show me the game, borrowed "Halo Wars" from one friend and I watched as he played it. I didn't see anything to concern me, broadly similar to the Lord of the Rings games he has which are 12-rated.
So, is anyone out there experienced in Halo? Has he been able to pull the wool over my eyes by playing the game in a particular way to steer away from the sections that earned it its 16+ rating? Or am I completely desensitised to videogame violence? 
Serious question, I'm inclined to give the PEGI ratings credence but from what I saw, if it had a 12-rating I'd be happy to let him have the game.