He does a LOT of pretty wild tricks. I checked them out in original Duke3D (DOS, v1.5), which I have installed here, and they check out.
For example, E1M4, he jumps and ducks and does something and ends up crawling through an impossible space! Normally you'd have to be hit by a shrinker to get in there, but nope: it's in the main game mechanics, so he's abusing a normal bug
And E1M2, he hits a switch to make the building blow up by ducking and "opening" a wall. Normally you'd have to get the blue key to lower this plate in front of the buttons. This also happens in the original.
And another one I was worried about was in E3, he'd kill a lizardman instantly with a shotgun blast in the face and kick. I thought this was wrong, as normally a lizardman takes 2 shotguns to kill. But no, if he takes the full power of the shotgun plus an up-close kick, then he will die in one shot.
See, in Duke3D it is extremely easy to edit how fast you move, how much ammo you have, how much damage something does, how much health an enemy has and so on by editting one of the .CON files. Of course, nobody would notice if he increased the damage of the RPG from 20 to 21, even though to him it might help out a lot, killing that one extra enemy in the splash damage radius instead of leaving it on the brink of life.
Plus, you have to note that the port he uses was made by the guy who made the BUILD engine.
For example, E1M4, he jumps and ducks and does something and ends up crawling through an impossible space! Normally you'd have to be hit by a shrinker to get in there, but nope: it's in the main game mechanics, so he's abusing a normal bug
And E1M2, he hits a switch to make the building blow up by ducking and "opening" a wall. Normally you'd have to get the blue key to lower this plate in front of the buttons. This also happens in the original.
And another one I was worried about was in E3, he'd kill a lizardman instantly with a shotgun blast in the face and kick. I thought this was wrong, as normally a lizardman takes 2 shotguns to kill. But no, if he takes the full power of the shotgun plus an up-close kick, then he will die in one shot.
See, in Duke3D it is extremely easy to edit how fast you move, how much ammo you have, how much damage something does, how much health an enemy has and so on by editting one of the .CON files. Of course, nobody would notice if he increased the damage of the RPG from 20 to 21, even though to him it might help out a lot, killing that one extra enemy in the splash damage radius instead of leaving it on the brink of life.
Plus, you have to note that the port he uses was made by the guy who made the BUILD engine.