Forklift

[colormage1]

How about this:

As many boards with outside Spawns (if there aren't enough, put a Spawn marker on the outside board, Hero's choice).

The forklift starts in the middle the 4 toxic cans are around it. The keys turn on the forklift; once it's on, it stays on. Gas gives the forklift five points; a point can be used to move a space and to drop or pick up a toxic can. Any zombies on a square with the forklift are removed from the board.

Heroes must use the forklift to transport the cans onto the spawning pits, then shoot or explode the canisters making the pit invalid.

This is the initial idea. (Just thought this up!) The forklift may need to get more points per gas, but I don't know. I like the idea of the heroes running to the forklift, filling it up, driving it, it stopping, running to find more gas, and so on. I think it makes the game really hectic and awesome. But again, I don't know! >>