mb HL2 is the greatest game for under age of 18. its made for kids. even its rated M. and it is certainly NOT the best FPS. very unrealistic guns and shooting compared to other great FPS (BF2, RVS, CoDUO, etc..) HL2 has great graphix though. but overall, its not impressive at all IMO. i personally dont like any futuristic FPS...cuz its all sprey and prey games mostly... its just my opinion.