Borderlands: The Pre - Sequel > General Discussions > Topic Details. Saica-Fox When you finish the AI quest you get a 3rd slot. #1. Croce. I've gotten pretty far in the game, I figured that I would've ran into one by now but I' m still able to only switch between 2 guns. Does anyone. Borderlands: The Pre - Sequel is a video game developed by 2K Australia with cooperation from Replaces the relic equipment slot from Borderlands 2.