Nauseous Crawler

Nauseous Crawlers are yellow variants of regular Crawlers. Any players that linger too long in front of one will be sprayed with a yellow fluid that will hold them in place for a few seconds, thus stunning them. This is hinted by the crawler stopping in one spot, and it will begin to puff up slightly and shake, before releasing the fluid. This attack is not blocked by effects such as Iron Skin which would otherwise negate the stun effect.

After Update 10, crawlers now "crawl" at you at a very fast pace, almost as fast as the other infested, and the lower half of their bodies have been removed. New animations for the spraying of fluid and attack animations have also been added.

They will appear on any Infested defense mission as of update 10.