Hi Everyone! I'm interested in running this game for my page, but I have a doubt, how do I start with de disarm ability? I see in the run in the second chapter the runner disarms a guy but I don't see the moment he upgrades in the menu that ability, is there a new game plus feature in this game? I have the enhanced edition BTW.

This is the original version of the game and upgrades do not exist (IIRC) in this version, only in the Enhanced Edition. The Enhanced Edition is almost a different game with the changes it makes.