blueskirt42: Sneaking is indeed totally broken in that game, 47's speed when sneaking is so damn slow it's impossible to catch up on anyone that isn't peeing. I believe most pro just walk (not sneak) behind walking enemy soldiers and when they're as close as they can, they quickly enter sneak mode, open the inventory, select the sedative bottle/fiber wire/knife and instantly click the mouse button as soon the inventory window is closed to silently eliminate non stationary guards. There are videos of that on Youtube. It's a mess if you ask me, and I'm damn glad IO was smart enough to fix this thing up in Contracts and Blood Money.

Also, don't give up, the first mission is badly coded in such a way that if you're wearing a guard uniform and enter another's guard field of view, this guard will follow you around non stop until he's two meters from you, see through your disguise and ring the alarm while riddling your body with bullets, the only way to silently physically make your way to the target in this particular mission is to avoid every guard, period. This problem is fixed in subsequent missions (except the second and third Japanese missions.)