Gamespy Left 4 Dead Preview lifts lid on matchmaking and achievements

The Gamespy Team has released another preview on the upcoming zombie shooting co-op game, Left 4 Dead. Here's a summary of it below:

- Game will feature built-in friends list making it easier to team up with buddies
- Apparently if there's a free slot in a game, you can jump in anytime - replacing whichever character is bot-controlled.
- There are four difficulty levels: Easy, Normal, Hard and Impossible.
- There are also four distinct campaigns.
- Left 4 Dead is a homage to the zombie movies by George Romero.
- The bot AI is very intelligent.
- Most gameplay occurs in the dark.
- The spawning of zombies and items will be randomised each time you play thanks to a "virtual director" feature.