I got the decoder from the stash but i have no idea where this secret lab door is. i though i found it but it needed a code, which i didnt have anywhere. and if i find the right door how am i supposed to use the decoder because there are no options for using it, it just sits in my inventory.
Finding the secret door is a real pain in the arse. What I did was pretty much load up the trainer, switch on god&unlim. ammo, and just sort of blow up everything with RPGs. Then, after most enemies were out of the way, I took the 'always turn left' rule... the idea of which is that you follow the wall on your left, make left turns, and at a dead end, U-turn and follow the wall to what's now your left (but was once the right). Finding the door is a pain, but a few good pointers:
- You MUST climb up a ladder in a narrow area to reach it - Before you get to it, you will see A LOT (as in, many many much much) crates & objects. - The door itself does NOT have a keypad. It looks like a large industrial refrigerator door.
Basically, be prepared to be searching underground in Chernobyl for a good 30-ish minutes before you find it. You will most likely have to look everywhere.