Two Secret buttons on the house of reckoning 

the third one is in the previous room at the top of the strairs. you have to press it before going onto the field

Third button is before you enter the room by the entrance, all it does it spawn in a rocket hog as an ‘Easter egg’

I found these as well but gave up on trying to find the third after a couple of hours, then realized you cannot go back to it after you complete the mission there. definitely upload once you find the third one! I'm probably going to have a good facepalm moment once it's found lol

You missed one ate the start

I found the switch right before you enter this room, but I didn’t find these two!

It's not a button these are through out the whole campaign lmao

First one is before entering this arena

What do they do

Very nice channel!!! Easy video ranking = P-R-O-M-O-S-M !