Killteam, my new defense mod can be found here: Moddb.com
While this mod is still playable, as mentioned before it is no longer being updated. Killteam offers the same kind of gameplay available here but has more heroes, more enemies, custom models, custom textures, new abilities, boss fights and refined gameplay. Killteam also has a fair sized Steam community at the moment so if you're looking to find others to play with it's as simple as scheduling an event using the Steam group: Steamcommunity.com