Here is the second weapon. I'm not gonna make a vid.
The overseer shoots out a missile (Spore Crawler - Acid Spew), strikes a target, then split into 2 (Roach - Acid Saliva). Each of them, after hitting the target, will disappear, strike another target, or split into 2 again. This will be a chain reaction which, if you are not unlucky, will kill all visible enemies. EPIC EPIC (again, =OVERPOWERD) weapon.
Type "sawnoutofmemory" into dialog to enable full sight to test the map
If your computer doesn't have a high performance, change as follows:
Effect - Spore Crawler - Spore Crawler (Missile) Copy
Ammo Unit: Weapon - ATA Laser Battery
Effect - Spore Crawler - Spore Crawler (Damage)
Death: Burn (realistic) / Normal (low performance) / Remove (even lower performance)