Thanks to:

ID Software
Valve LLC

XaeroX for hosting, technical advice and moral support
Crazy Russian for HL-Style menu buttons code and animation
adamix for scrollbars code in menu
HAWK, ERIK-13 for translate features.txt on english
n00b for detail textures implementation

Beta-Testers:

The FiEctro 
Crazy Russian 
HAWK 
qpAHToMAS 
LokiMB 
Msteam 
(_-=ZhekA=-_) 
Qwertyus 
Necro5oul


Xash3D using some parts of:

Quake 1 (Id Software)
Quake 2 (Id Software)
Quake 3 (Id Software)
Half-Life (Valve Software)
Darkplaces (Darkplaces Team)
Quake 2 Evolved (Team Blur)
AVIKit (by randomnine)