Alpha Grims are an elite form of Grim that appears in the co-op campaign of Resistance 2.
The Alpha Grim strain are larger, stronger, brighter in appearance then normal grims, and have a very strong resemblance to the Grey Jacks from Resistance: Fall of Man. The cocoons of Alpha Grims are trice as big as regular grim cocoons and look brighter in appearance. Also, alpha Grims attack in numbers of between three-five at a time. Alpha Grims appear to be the Primarch command units for the Grim strain