I think anything involving engineers in the military is pretty off base in scifi games and movies. Usually in a game an engineer in the military is some kind of tech dude running around with all kinds of gadgets like deployable drones, and door hacks, and sentry guns etc but is usually nuetered when it comes to offensive armament. I think developers see engineers and just think like geniuses in stem fields or something that are just in the military due to bad luck or to pay off college or something.
But in reality they are just infantry dudes that aren't in the infantry that carry a bunch of blasting caps, shock tube, det cord, and c4 as well as all the typical armament a basic rifle squad in the infantry would carry.
I had an m4, m320 grenade launcher, the typical combat load for ammunition, an improvised breaching charge of det cord for blowing open doors, a sledgehammer for bashing open doors, a couple of blocks of c4, blasting caps, and shock tube.
If games wanted to be accurate they would give us the same loadout as the infantry, but then penalize us speed for all the extra shit we carry.
As an aside, I once had to carry so much shit that I had no room for the improvised charge in my pack, so stuffed the blasting caps into my cargo pockets. I was smart enough to put the charge portion in the opposite side so in case any accident happened the blasting caps wouldn't set off the det cord, it isn't anything to combine them back together to make the full charge. Anyways, we were rucking to the objective and I fell and landed right on the blasting caps, and it is a very odd feeling to be thinking as you are falling that you are going to hit the earth and when you do your going to get back up with holes in your legs from where the caps went off.
But luckily I didn't hit hard enough for that to happen and so the dingle got to dangle another day.