The Sentinel in this game is a higher level Sentinel. I don’t think he is mark iii or iv, but he has to be a specialized unit He’s not the same Sentinel models that X-men just rip up easily. If you look at this Sentinel he does not resemble the Mark III or IV model. Sentinels have show they can be very powerful. Lower model Sentinels have the same issue:
Durability - The Sentinels are made out of easily destructible metal usually. The in game Sentinel is clearly made of a high grade of steel, possibly solid aluminum
Mobility - The grunt models fly in specific patterns. They also aren’t very fast, and can’t doge attacks. The in game sentinel flight animation he folds his body like a hovercraft. Sentinels typically do not fly in this manner
Armory - The Sentinels typically shoot lazers out of their hands. this Sentinel shoot lazers out of his mouth. The grunt model Sentinels also have eye lazers, this Sentinel clearly doesn’t. This Sentinel is also equipt with Rocket, and if we were to take hints from COTA, also has concealed weapons on his feet like saws.
the in game Sentinel is not a grunt model. He was created for the game, but he is a specialized combat unit with high stamina and durability. The fact that in Marvel 2 and Marvel 3 he has lighting indicating he is shining shows he is made denser material than grunts (who does not have reflective metal). The grunt Sentinels like Mark III and IV appear to be made of some dense plastic material with. Also while in game made not be cannon, the Sentnel in game has fighting ability and can extend his arms and legs. Mark III and IV Sentinels can’t do this.