if youre like 13 or something it shouldnt be. I played half life when I was 9 or something and it scared the heck outta me coz I ran out of bullets and all I had was a crowbar :P
really fun like Gregbyte said if ur 13+ u should be fine, 8/9- wouldnt recommend it, BUT i would like to tell u a quik story lol it was my b-day and i got half life 2 for xbox and i waz playin it and i had 2 friends over, and we had many, many, ....MANY energy drinks so we were like twitchy and freeked out by everything, and one of the zombie doods jumped up from a puddle and we all yelled, LOLLLLL (this was in my room at about 12:30pm, yes my parents were a asleep lol) anyway no ITS AWESOME
LOL try playing high... ten bucks says you be so tweaked you wouldn't know what was happening. Then one of those zombie dudes would be running after you with a chicken thing on his head... lol. Ya its not scary. other than the one with the zombies and shit. HAHA. (ps i dont get high, i just know ppl who do)