How to install The Witcher 3 mods manually There are two ways to install mods in the PC version of The Witcher 3 - manually, or through a mod manager. How to install mods in The Witcher 3, step-by-step If you're looking for more assistance, our Witcher 3 walkthrough can help. The best other mods to consider for The Witcher 3.Our picks for the best mods in The Witcher 3.How to install mods in The Witcher 3, step-by-step.