I have leveled up and put all my skill points to 100 ex. Lockpick 100. But when I leveled up, I got negative skillpoints popping up on my screen. What's up?!
Try using the PC Console which was used by Developers but can be used to up your Skill Points, Spawn enemies, make Godmode or anything! Best of all there is no download required and is only on the PC Version! Enjoy! Link