1. While at the lake, you comment on how realistic the water refractions look before you realize that it is real-life.

2. You take a few minutes to closely examine your own shadow cast.

3. When you study half-life in science class, you automatically think of the game.

4. You called in sick to work/school to play HL2.

5. You were given a choice of sex with the hottest girl you've ever met or play 1 hour of HL2 on a top-of-the-line system, and you chose HL2.

6. When you tell your friends to go somewhere, you point in the direction and yell "C"

7. You spend all night on the Internet looking for a crowbar identical to the one in HL2.

8. You think that smashing a wooden box twice with a crowbar will make the whole thing collapse.

9. You hear a police radio and think it's a Combine soldier.

10. You know about The Half-Life 2 Kid.

11. You stock up on food, water, and weapons in case of a Combine Invasion.

12. You shine a light on your hand, see a vein, and think it's a bump-mapping effect.

13. Instead of going to the hospital when you are sick or injured, you look for health packs.

14. You refer to your hometown as City 17.

15. You change your name to Gordon Freeman.

16. You change your appearance to resemble Gordon Freeman.

17. You never talk to imitate Gordon Freeman.

18. Whenever you hear the last names Mossman, Breen, Calhoun, or Kleiner, you think of HL2.

19. You think people will just say "Stop that!" when you throw a shoe or a bottle at them.

20. You think Steam is cool.