I just got the game half life 2 then I saw "episode 1" and thought "Ah gosh, I thought there was only 1!!!" but I am confused weather its the one in the demo or not. help?
Half-Life 2 is a game by itself, just like Half-Life 1.
The new half life is a continuation of HL2, which is coming in three Episodes. HL2: EP1 is out now, EP2 is coming out in Q1 2007, and im not sure about EP3.