I've been playing Lost Planet 2 for a few days now, and I just recently unlocked the Injection Gun II. Not knowing what it did, I didn't bother with it at first, until I unlocked the standard Injection Gun. Now, I've noticed the GJ (Good Job) hints at loading screens, telling me that firing upon my teammates with the Injection Gun is a good thing to do, but even after doing so, I really have no idea what it does. Can someone tell me what the effects of both weapons are on your teammates?
Also, I've noticed that the Injection Gun II seems to have two settings: Green, and Red. I'd appreciate it if these could be explained as well.