1. Half-Life 2(PC) - Nerdy scientist (1) turns into a badass nerdy scientist with a CROWBAR!(2) 2. Counter-Strike:Source(PC) - Gotta love 1.6, but I choose this because of the gameplay and better engine. 3. Knights of the Old Republic(PC) - Awesome. Just awesome. 4. Star Wars: Jedi Knight: Jedi Academy(PC) - Good, but the storyline was inferior compared to its predecessor. 5. Star Wars: Jedi Knight: Jedi Outcast(PC) - Classic. I love every aspect of this game. Storyline, awesome. Graphics, I love them. Gameplay, well, yeah.