Crawlers are advanced Forerunner A.I.s and a new class of enemies in Halo 4.
Despite being quadrupedal, they are capable of both close-quarters and long-range combat, having been explicitly engineered to ferociously hunt down and eliminate any foreign threats.
It is not uncommon to encounter Crawlers in substantial numbers, as most travel in large packs and work together in strategic coordination to bring down enemies by overwhelming them from every conceivable angle.
| Crawler
| The Basic Crawler is the most common Promethean on Requim. They are softer targets than the Knights but they are just as fast and come in large numbers. Despite being small and nimble, they also come with ranged weapons and are capable of fighting at a distance as well as up close. |
| Crawler Sniper
| Not much is known how improved the Snipe is over the standard Crawler though it is presumed that this version would be a much more capable marksman and perhaps even be capable of using Sniper type weaponry. |
| Alpha Crawler
| The Alpha Crawler tends to be the leader of a pack of Crawlers. This version of the Crawler is a signifcant step up from the lesser Crawlers, packing more armor and more power than the others. |
