Since this MOD has been highly requested, I decided to release it publicly.
This MOD allows PvP gameplay, by placing players on separate teams. It also allows you to craft and spawn Biters/Spitters/Spawners/Worms to use against eachother.
How to use:
Every second player to join the map will be placed on the enemy team, so you must decide teams in advance and join the map accordingly.
Player 1, 3, 5 etc to join the map will be placed on player team.
Player 2, 4, 6 etc to join the map will be placed on enemy team.
Generate a map, and move in teams away from the starting area to find a good starting position(or create a scenario with good resources away from the starting area, and use that).
(when generating map, turn enemy bases size to None.)
Known problems:
All research is unlocked automatically when you join the map. (if you don't want this, you can edit out the line in control.lua)
Spitters and Spitter Spawners do not have their own icon, so they use Biters and Biter Spawner icons in the crafting menu.
Biters and Spitters can be thrown onto water. This is either a problem or a strategy, depending on your views.
Biters/Spitters/Spawners/Worms on the player team do not show on the map.
Your own Biters and Spitters will attack you if you shoot them.
Placing biter/spitter spawners sometimes causes desync.
What I would like to see:
If you change the MOD in any way(more efficient code, better balancing etc) please keep the original info.json intact.
If you create some nice scenario maps, please post them here so others can also use them.
CHANGELIST
Maps: (Have a good map? Post it here and I'll add it to this post.
)Credit:
To L0771 for helping me make the craftable items.
To FreeER for making(and remaking many times) the code for putting players on separate teams.
To Sigmatron for making the code that has biters attacking buildings and following player.
To Klonan for the scoring system.
Disclaimer: This MOD will be useless when 0.12 is released, where separate teams/research/etc will be implemented into the vanilla game(according to this post by kovarex.)
), ANYWAYS, what'd I do right? Essentially I added some code so that you could have named teams (also the setTeam call means that you don't have to join in any certain order now), funny how such a simple thing made it about 5x longer 
It should be pretty easy for someone with a bit of Lua/Factorio experience to add a team death counter or something...
