This is a multi stage challenge:
- Stage 1: Search the letter O west of Pleasant Park
- Stage 2: Search the letter S in Wailing Woods
- Stage 3: Search the letter M in Dusty Divot
- Stage 4: Search the letter N under a frozen lake
- Final Stage: Visit the NOMS sign in Retail Row
- "O" can be found next to a dumpster at an abandoned house not far west from Pleasant Park.
- "S" is in the Bunker under Wailing Woods.
- "M" is found in the southernmost building in Dusty Divot.
- "N" is found in a submerged building at a frozen lake north of Polar Peak.
- The Noms sign can be found above the grocery store in Retail Row.
See map below for help finding all the letter locations.