Fallout 3/The Superhuman Gambit

In Canterburt Commons, there are two people fighting near the town: The AntAgonizer, and the Mechanist. The fighting is causing trouble within the town.

The AntAgonizer is located north of the town, in an underground bunker, and the mechanist

AntAgonizer
The antagonizer's bunker is located to the north. In addition to having a few traps, the entrance is closed by a electrical switch closing access to the floor.

She believes that humans destroyed themselves during the warfare, and as such, she believes that Ants should become the masters of the wastelands, because they survived.

A Lady Killer can convince her to peacefully give up the fighting; she will give you the costume and you will be rewarded with good karma. However, most of the regular dialogue options may give a high risk of initiating combat.

The AntAgonizer counts as an evil character, allowing you to obtain a finger from her.

The mechanist
The mechanist is located in the repair center to the south. The main elevator to his forge is locked with a hard lock (requires 75 lockpick). Alternate routes are available if you have a 50 lockpick skill or wish to go past a few more turrets.

THe mechanist saw the AntAgonizer make an initial attack, where his love was killed. His tramutizing experience convinced him to use his computer skills and use the robots to defend Canterbury against the AntAgonizer.

A Black Widow can convince him to peacefully give up the fighting, after being told that the nearby city is being troubled with his fighting.

However, The Mechanist is not an evil character.