Custom Missions are additional missions for KKND2: Krossfire. 

Custom Missions

 798 Missions

custom campaigns are basically just custom missions that you can play as a normal campaign. enchanted, isn't it?

Custom Campaigns

4 Campaigns

Click here for the multiplayer map collection

Multiplayer Maps

144 Maps

a small selection of demos from KKND / KKND2: Krossfire and no you can't build ballista towers 

Demos

6 Demos

The KME is a tool to create custom missions, custom campaigns and multiplayer maps for KKND2: Krossfire

Krossfire Mission Editor