XSOLDIER is a modification for Quake made by SHYFT. This makes Grunts able to randomly throw a grenade. Each map load will also choose certain Grunts and replace their Shotgun with a Double-Barrelled Shotgun or Nailgun, making them more lethal.
If the player has MultiSkin, they can uncomment some lines to make the Grunt use various skins in said file.
Note this modification requires a compiler. The modified code includes a credits section at the top, though this is not properly commented out and thus will cause the compiler to fail. If the user removes this line or comments it out, the modification shall work fine.