We were having a discussion on the development channel regarding potential alternate game modes that could be included in future releases. What are some of your ideas? Try to go as in-depth as possible, and remember that fewer radical changes to the basic team deathmatch will ensure that your idea, if it's good enough, will be done in a timely fashion.
One idea I've been fond of is bomb mode. The idea is that you've got a bomb, which is a buildable you can construct on either team. While the humans get some large high-tech bomb, the aliens probably get something else, like a spore of sorts. Regardless, it works the same on either team, and the goal is to get the bomb to go off. First, you'll need to put it in a safe place so that it can construct, which would likely take a minute or two, and then you've got to set it off. Once it goes off, an evacuation message is broadcast to the entire map, and you've got to get as far away from the bomb as possible. Then, I suppose either one of two things can happen. Perhaps you win by having the most teammates left after it goes off, or just from having it go off in the first place.