Secrets not found (For those who like to look for secrets). You can change clothes. New Game + is unlocked. Start at the beginning of the level
Lara is fully equipped (For easy exploration)
You can complete the trials from the Hall of Seasons (After loading any trial, you need to defeat the rest!) (This is not possible in the old file)
Installation:

Download the file
Move the downloaded file to the path below
C:\Users\USERNAME\AppData\Roaming\TRX2\76561199554954189

(Make a copy of your save just in case)

3. Just replace "USERNAME" with your actual username, and "76561199554954189" with any digital ID you see. This number is your Steam Community ID, so if you have multiple accounts with Tomb Raider IV-VI Remastered, there may be multiple folders.

Author: Dark human 56272