The idea is based around co-operative play, a group of players must defend a fortification from attack - but the enemies do not randomly spawn - they evolve from lesser species. So, at the start of a game - the enemies are all fish - accumulating in any vat of water they can find. The players can take the opportunity to fortify their main position or to destroy as much of the enemy as they can, which will slow down the evolution process. Fish turn into pupae, pupae turn into Skarrj etc.
When a species grows large enough they create a hive which will slowly reproduce more enemies to take over the fort. This will be defended by a greater enemy, the Queen. This must be killed to erradicate the species for good (though if lower species are left, they will evolve again).
Blockades such as concrete barriers can be placed around the world which can be picked up and dropped to slow enemies down. These will spawn throughout the map randomly as the game progresses (generally, as more species grow - you get more barriers). Weapons will be distributed as normal, but as species overrun the fort they will of course be harder to reach.
I am thinking of adding custom weapons into the game, I have a number of models from another project that can be used - only about 5 'extra' weapons in total but enough to make the game play more interesting. Trip mines are also a thought.
The issue here is that I am not a coder, I'm an artist. While I can provide weapons, additional skins and other models (blockades), I can't do any of the code required to get this to work. I have an idea of how it would work, however.
When a species reaches a set number, a 'countdown' begins. If the number remains high enough for a certain amount of time, then the next species evolves. Hopefully this would create a dynamic gameplay type, with multiple branches of evolution (so one species *could* evolve into 3 different enemies).
If any coders would be interested in helping me with this, let me know - just reply
Oh, also to show that I am at least a half capable artist here is a project I run for Deus Ex, New Vision.



