Easily one of the most diverse weapons in current use, the Grenade Launcher can fire up to eight grenades at a time, either seeding an entire area for later detonation, or directly targeting enemies. Lined with electrostatic emitters, each grenade adheres to both enemy vehicles and infantry, the detonation of which lies completely in the hands of the weapon holder. When employed with creativity and timing, the Grenade Launcher can be a very powerful weapon. -- Official description

The Grenade Launcher is one of the more useful defensive weapons in the game, but it isn’t very good when used offensively.

The primary firing mode fires a grenade that sticks to a surface or object. You can fire up to eight grenades at a time. No matter what they come into contact with, they will stick, and will remain there until you detonate them, or you are killed, which will detonate them automatically. There are several useful strategies for this. You can plant a grenade or two on an enemy vehicle, and detonate them when an enemy tries to get inside. You can put a grenade on an item or powerup, again detonating it when someone nears it. You can stick a grenade to an enemy player, and wait for them to get into a crowd before detonating it, hurting or killing them all. You can also use the weapon in tandem with the Mine Layer. Plant a mine, stick a grenade on top of it, and when the mine finds an enemy, it will detonate the grenade along with it, resulting in double damage.