Co-op Mode

Co-op mode is a future added in the XBLA version and removed in the DS version

Co-op modes
The coop mode has Co-op Day, Night, Pool, Roof, Bowling, Zomboss, Day hard, Night hard, Pool hard, Roof hard, and endless.

For some reason, there isn't a Co-op fog and Co-op Fog hard.

Co-op is pretty much like Survival Mode but the normal Co-Op levels have 2 flags(and three) instead of a full survival (hard) thing which is on the Co-op Day hard ect.

There is even a co-op endless mode

You can also butter any zombie in any co-op mode by holding down the"x" button, it will paralyze them aslong as you hold the button

Trivia

 * On Co-op mode when you select it, the people make a "mmm" noise and like each other.
 * On Co-op mode for some reason, it does not have a Co-Op Fog and Co-Op Fog Hard.
 * This is probably because it would be hard according to the fog.
 * No matter how many seed slots you have, you and your partner will always have eight,
 * Perhaps this is because if you have an odd amount of seed it wont be unfair to the other partner