[Huwajux]

Perhaps the aliens could work like an entirely new species (Which they are). They could use their claws as a melee attack by pressing S, it would be the same speed as the carrot's S swipe. They would be a lot faster than the infantry too.

The infantry could use a pickup system, where they find weapons lying around and use them to their advantage. However, the acid attack given off by the aliens would make you have to drop your weapon otherwise your health would deplete like the energy when using a jetpack. The infantry's default weapon would be a pistol (The apripper, slowed down probably). This pistol cannot be dropped and the acid attack would not work.

The infantry could also use proxmines, however the alien's would have a 'sixth sense' that lets them see where these proxmines are, however their range of vision on the screen is reduced via a circle of light surrounding them and everything else in darkness. The acid attack would also have a short range, making the aliens rely on their speed, claws and brains to try and take down their enemies. Such as ambushing the infantry in certain areas and charging at them trying to dodge their shots. Also, the aliens would be a bit faster than the commando class and would have a completely new body GFX.

The infantry would rely on their long range and sheer power of the weapons. Also laying proxmines in places the aliens would not expect.