Easter Eggs

Red Faction: Guerrilla
Red Faction: Guerrilla has a lot of easter eggs, some still undiscovered.

Old Coot
Old Coot is found in Mohole in The Badlands, sitting on a bench next to his shack. This old man is most likely Parker from the first Red Faction game, but it is not known what he is doing in the Badlands.

He also mentions the fact he is indestructible when you try to hurt or kill him and he seem's to be.

Ultor Ruins
In the Badlands are old Ultor ruins, mainly the remains of Capek's facility. In here, a Radio Tag and the Nano Forge are found. While walking through the ruins, Alec Mason can hear voices talking about Parker.

Mars Rover
A Mars Rover can be found in The Badlands. It appears at the dead end of a small gully and appears as a vehicle, although it is not driveable. It is the only indestructible prop on Tharsis. (More accurate location needed)

Various Radio Tags
There are 36 Radio Tags spread around Tharsis on Mars, and some of them carry a nostalgic message, mostly from the previous Red Faction games. For example, a radio tag of Alias can be found, containing a piece of story.