You're looking for information on the save game for Tony Hawk's American Wasteland on PC, specifically for 100% completion. Here's what I found:
A secret cutscene plays. Tony Hawk himself, pixelated but proud, leans against a half-pipe. tony hawk american wasteland save game pc 100
Copy the downloaded Save0.sav (the 100% file) into the Save folder. You're looking for information on the save game