Just completed the EE ending. Here is a brief guide of what I can recall.
Edited: Shoot the panel to the right of the summoning key to open the metal door.
1) get summoning key and place it on the ritual table.
2) Shoot 3 antennas in the outside area with an explosive weapon.
3) Pickup a small antenna.
4) Place it in the spawn room.
5) pickup a radio in the bar.
6) place it in the spawn room.
7) Find the Jackhammer in one of the caves.
8) Mine a black and blue rock, in one of the caves.
9) Place the rock at spawn.
10) EE complete.

I think someone skipped a step in there lol

theres a button in the room before cherry which opens the metal door in the widows room. antenna is by the door to the gym and the 115 rock is by the remington wallbuy

bro how do I get the

Hey everyone! Here's our full walthrough guide for those of you who are still struggling with this map. Hopefully it helps you all out! :D

https://youtu.be/mJ-OgxG-MXU