Genius Missiles is a modification for Quake made by Iikka Paavolainen. This modification is a further expansion to the older Homing Missiles mod with the improvement that they should no longer lock onto Doors and triggers.
The Rocket Launcher missiles are even more intelligent in this version, being able to enter a "hunt mode" whereby it roams an area while searching for an opponent to destroy. A message will appear telling the player what it has detected and homed in on. This means that it rarely hits walls unless the player is firing too close to the wall.
To balance the modification, the Missiles are 30% the speed of a regular Rocket, while also costing 2 Rockets per use. Furthermore, they only last 20 seconds before they "self-destruct". Self-destruction simply means that they are removed from the level with a message being shown, they do not explode under such circumstances.