If you want to fully explore the Latopolis facility, then you must unlock the door by inputting the correct four digit code. Once the door is opened, you’ll be a step closer to completing the mission and, hopefully, finding a backup of GAIA. Below you’ll find the code for the bunker door, along with how to find it, so you don’t get stuck in an abandoned lab. If you’d like to learn more about Horizon: Forbidden West, check out our pouch upgrades, Tallneck in Cinnabar Sands and levelling and skill points pages. To find this code, you need to head to the southern section of the room where the locked bunker door is located. There you’ll find a collectible, which, when read, contains the four digit number you’ve been looking for. Good luck in Horizon: Forbidden West!