For a long time, Sergeant Forge (outside of his Warthog) has been considered the worst unit in the game. However, recent discoveries have led me to believe that Sergeant Forge may actually be the best unit in the game.

https://gtm.steamproxy.vip/ugc/1893219330258851890/5655868C2439173DDA95C966D7EFF39D12F78F6A/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false

Let me explain:

In the game's cutscenes, Forge is shown single-handedly killing the Arbiter. Keep in mind that in-game, the Arbiter is capable of destroying almost any unit in the game using his Rage Mode. The fact that Forge is able to kill the Arbiter is astounding, and this only hints at Forge's true strength.

However, there's a problem. In-game, the developers realized Forge's unparalleled strength. To nerf him, they gave him a weapon that's about as effective as shooting a spitball at the enemy: The M90 Shotgun. Quite effective in other games, however completely useless here, since the weapon is either severely damaged or Forge has no clue how to use it.

The key to unlocking Sergeant Forge's latent potential is to get rid of the M90. This is theoretically possible, and doing so would increase Forge's power drastically. Given the fact that he beat the Arbiter, he would be a very powerful melee unit, similar maybe to the Honor Guard unit on steroids,
https://gtm.steamproxy.vip/ugc/1893219330258880754/337B6EA437AFFF44BAFDEBA2A7C20BB3310B8BEF/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false

This is only a theory, and has not been proven in-game. However, the potential is there, and it's up to the player to figure out how to tap into it.However, there are several problems with this. First and foremost, it's LIKELY impossible to remove the M90 from Forge without modding the game, which voids any and all potential achievements. Secondly, even if you did get rid of the M90, Forge's overwhelming power would likely be too powerful, and would unbalance the game.

All in all, it's unlikely that we'll ever see Forge's true potential. He's a powerful character in cutscenes (perhaps on the level of Master Chief himself), but in-game, he's little more than a walking punching bag with a BB gun..He's been severely nerfed by the developers and it would take quite a bit of work to make him viable again. However, it's not impossible, and doing so would make him one of the most powerful units in the game. However, with a little imagination, one can see what Forge could have been, and what he could still be.