Granger

The Granger is the alien's building class. Grangers start out with 50-75 HP and have the ability to grow structures and to bite humans to defend themselves. There are 2 types of Granger: Granger and Adv. Granger.

Granger
The Basic Granger is the weakest and slowest alien class. It has 50 HP. It can only build and destroy structures, and it cannot attack enemies, nor can it wallwalk. It can only build the Overmind (if there isn't one already present), Eggs, Acid Tubes and Barricades.

Adv. Granger
The Adv. Granger is much better than it's counterpart. It moves slightly faster, jumps higher, and can wallwalk (which allows it to build structures on walls and ceilings). Its HP is raised to 75. At S2 it can build the Trapper and Booster. At S3 it can build the Hive and the Hovel, plus the buildings that it can build at S1 and S2. Also, it can attack enemies (slashing) and it can lob small projectiles(which do little damage; about 2-3 damage to an unarmored human, but can slow him down). A head shot however is quite effective.

Hovel
The Granger can hide in the Hovel when under attack, though in the Tremulous 1.2 gameplay preview the hovel has been removed.