These resources will provide you with detailed information on unlocking specific items, including offline exclusives.
If you prefer not to use mods, your options are limited by the game's design: hitman 3 unlock everything offline exclusive
It runs a local server on your own computer. The game "thinks" it is online, but it is actually talking to your PC. These resources will provide you with detailed information
For single-player purists, this is anti-consumer. For IOI, it’s a design choice that protects their live-service ecosystem. this is anti-consumer. For IOI