Weapons:
Crowbar = Pipe
Gravity Gun = other model only
Pistol = Glock
Magnum = Desert Eagle
SMG = MP7
AR2 = M4
Shotgun = other model only
Crossbow = Sniper Rifle
RPG = other model only
Grenades = other model only
The Glock will have 15 shoots, the MP7 will have 100 shoots and the Desert Eagle will have 7 shoots. (The rest is the same.)
New Map:
A little map where you can practise all the stuff.
It's a extra Chapter you can play from the beginning.
And this map appears after you have done the Tutorial.