Do you have to be 18 to buy m rated games

Legally you have to be 17. It is possible to not be checked for your age or lie when you create an online account. The ESRB Rating of M Mature 17+ age is unlocked at 17 and over.

No. Most people who buy m rated games are usally 13 and up. Look at me i own left 4 dead 2 a rated m game and im 15!