Based on threads from TDU Central and Reddit (r/tdu):
Warning: This patch requires a clean installation of TDU Platinum (Update 1.0). Do not install this over older patches like 117 or 119. test drive unlimited platinum patch update 121
Step-by-step guide:
Due to copyright laws (the patch redistributes modified Atari binaries), I cannot link directly to the file. However, you can find the official hash signature to verify you have the correct file: Based on threads from TDU Central and Reddit (r/tdu) :
"Test Drive Unlimited" is an open-world racing game developed by Eden Games and published by Atari. It was released in 2006 for the Xbox and Xbox 360, with a PC version following later. The game is noted for its vast open world set on the island of Oahu, Hawaii, where players can freely explore and participate in various racing events. Warning: This patch requires a clean installation of
The core of the Platinum experience is the cars, and Update 1.21 introduces targeted fixes for specific vehicles that were underperforming or bugged in previous versions.