Right now, there are many people wondering if there will be a multiplayer mode in our mode I've been thinking about it, and I've come up with a possible idea to how we can incorporate multiplayer into a single player based mod. I've codenamed this gametype "Allied Resistance".
It will pretty much be a separate 4 player co-op mode where you rush through levels killing as many enemies as possible, all along collecting weapons and items you can use later on in the campaign. There really won't be a set story, other that your objective of neutralizing any mutant or hostile human. I think it will be score based and whoever gets the most kills wins. Which is why it's important to collect things. Say you get a shotgun, this will greatly increase your chances of killing enemies at close range.
The whole campaign will be rather short, 4-6 levels, about 5-10 minutes each level. I'm thinking every level will be indoors to make it seem very claustrophobic, and exciting. Different parts of the levels will give players different chances to get points, maybe there will be a office space building where you can shoot out of the windows at enemies on opposing rooftops.
I really hope we can get a coder so that we can make this a reality. If you have any suggestions for multiplayer, please share them with us (try to stray away from deathmatch/ctf and stuff like that, simply because they really don't relate to the game's story.) Thanks for your time guys.