The bugmod is an abandoned Keen 1 mod by KeenRush. It features a unique gameplay experience achieved through heavy patching. Keen has to fight Mortimer's malicious botnet and transfers his own mind into the system to find its weakness. After doing so, Keen unleashes malware beings known as the Buggings to infect the data ports. The player's task is to lead the Buggings to a certain point in a level to finish it. Keen is able to create platforms on the ground to help the Buggings reach their goal. They are unlike any creature in the original game and interact with their environment.
In June 2014, KeenRush announced that he has abandoned the mod and released a tech demo with four levels.