The Mole

The Mole is a terrorist who targeted City 17 in 2010 and later 2012, with the intention to cripple the Resistance Government and build a new world with his followers. He is the enemy of Agent X, a top field agent for the Resistance.

Biography
The Mole operated in an underground bunker in the Outlands, where he plotted to target City 17 and bring down the Resistance Government. Their top agent codenamed simply as "X", was dispatched to the Mole's lair to eliminate him. But upon Agent X's arrival he found that the place was rigged to blow by the Mole, who had long since departed elsewhere. Agent X managed to narrowly escape the tunnel and to the surface before the place was destroyed and buried.

Two years later, the Mole resurfaced where he waged a war against City 17 and numerous other Combine cities, planning to cripple the Resistance Government and create a new world in his image. He gained access to the tunnels underneath City 17 and rigged them to blow, threatened to completely destroy the city. Thanks to a task force led by Agent X on behalf of the Resistance Government, they managed to prevent the Mole's plans. Agent X captured Mole and came close to shooting him, but chose to bring him into custody so not to martyr him. Mole was then taken into custody, swearing that one day he will escape custody.

Sandbox World
When Nathan Johnson got trapped in the "Sandbox" dimension, he came across numerous characters from past storylines and other multiverse plotlines. He came across the underground bunker run by the Mole, who has allied with a zombie Wallace Breen and an undead Zara Zimmerman, the latter whom has joined forces with the Combine. Agent X has kidnapped Breen's son Charlie in order to force Breen to prevent Mole's plot to take apart the known universe. Agent X is joined by cat version of Alyx Vance and Gordon Freeman, as well as a human version of Alyx Vance to stop the Mole. The Mole's head is blown off, and Agent X deactivates his machine to stop the "world" from crashing.