ALTHOME is a modification for Quake made by Chris Hilton. This modification allows the Rocket Launcher to fire homing missiles.
Homing missiles fire about as fast as a rocket. The homing missiles curve slowly, meaning that there is a greater risk of the missiles missing their target if fired at too extreme of an angle. It also is allowed to erratically change targets, making it more unpredictable, and is allowed to rarely target the player who fired the homing missile. Furthermore, a bug was fixed in this particular release to prevent the homing missile from targeting Doors.