Geronimo appears for the first time in the video Fallout New Vegas Mods: Angel Park - Part 1.
Geronimo Is a hamster. As said by Al himself: "Go hamster go".
Through Al's lively imagination, Geronimo has been given a unique personality, like most companions. In the loading screens he will commentate the situation. For example, when Al had accumulated a large number of followers, Geronimo commented on the likeliness that the game would crash when they walked into a small tunnel.
- Geronimo is the first "companion" gained by Al in his Fallout New Vegas playthrough.
- In Al's second playthrough of Project Brazil, Geronimo's ball was replaced with a line, much to Al's dismay.
- In New Vegas Mods: The Empire Wasteland - Part 4 - Exploring!, Al mistakenly calls Geronimo Gerald, possibly confusing him for another rodent he knows.