Phase 1 is a side quest in South Park: The Stick of Truth.
"Retrieve underpants for the Underpants Gnomes."
After going on a rampage against the Underpants Gnomes during Defeat the Underpants Gnomes, a representative comes to your room but with an offer of diplomacy: collect enough underpants from the residents of South Park to placate the gnomes over the loss of their friends.
The New Kid must gather five pairs from the neighborhoods in town.
Underpants can be found in:
- Liane Cartman's bedroom
- Kyle's bedroom
- Stan's parents' bedroom (opposite from Shelly Marsh's bedroom)
- Stan's bedroom
- Kevin's bedroom
Once enough have been gathered, return to the gnome who accepts the offering and your new 'friendship' on Facebook.
- The underpants can actually be gathered on Day 1, long before this quest begins, but they don't offer much except an instant conclusion and experience gain when the quest becomes available.