It's insane on "Give me Deus Ex". Heck, it's insane on "Give me a Challenge". I started again because I couldn't get passed the first few firefights on GmDE. You know why? Much as I'm very much liking the game, the guns SUCK.
The machine gun has recoil that's beyond stupid and is useless in 90% of fights.
The shotgun has a kill distance of about 5feet, or about 45feet beyond where you are already dead.
The SEPS gun has never taken down more than 2 people in a group of 8 or more, so that's pointless.
The sniper rifle scope is a) tiny, b) zooms in at place that wasn't in the middle of your view previous (so it takes ages (ok, 1 second) to find your target), c) waves around like you're on a boat. Coupled with the sometimes jerky motion of the characters, so that their head is in 1 place one moment, and to the left the next, means that, again, it becomes a fairly useless weapon if you have to take down more than 1 guy.
So then we come to the pistol/revolver. Held in the hand ROCK SOLID. Seemingly unlimited distance. Does similar damage to the shotgun at said distances. I've taken down a group of 4-5 guys with the pistol, all head shots, then sniped a guy on a railing, above me, at the other end of the room. I gave up trying to kill the first boss with machine gun, shotgun and grenades. I took him down with the revolver in the end. THE PISTOL SHOULD NOT BE THE BEST WEAPON IN THE GAME.
Absolutely insane.
Great game otherwise.