This activity can work with ANY map that has the following areas:
1) Enemy LZ
2) Enemy Spawn
3) Rescue Trigger Area
4) Rescue Area
5) Brain Area

"Enemy LZ" is a primary zone for enemy reinforcements to drop. "Enemy Spawn" is a secondary wave spawn point. "Rescue Trigger Area" waits for brain to enter and once he's in it Rescue ship spawns above "Rescue Area" and you can evacuate your brain.

To make any map you want playable with this mode you need to place all this five zones on your map in the area editor.

Notice that there can be multiple Enemy LZs and Enemy Spawns. Also, you will need to place some "deployments" via scene editor.

Have fun!