The Engineer is best suited for defense. His ability to build
sentry guns and ammo depots are his strong points. The
sentry gun can provide a strong automated defense of an area.
The ammo depot can provide virtually unlimited ammo to his
teammates in areas away from the supply rooms. An Engineer teamed
with a Gunner can provide a very strong defensive team. The
sentry gun provides a strong fixed defense, while the ammo-hungry
Gunner (with the help of the ammo depot) provides a more mobile
defense.

The Engineer also has magnatron and shock grenades. The magnatrons
will draw enemy players towards them, then explode. These work best
when combined with a sentry gun since they can prevent escape from
the sentry's deadly fire. The shock grenades electricute any enemy
players in range.
