Buttons:
-In the starting room, in a corner between two metal doors
-Outside, inbetween two wooden planks next to a red tool chest
-Under spawn, next to the buyable door leading upstairs
-In the middle of the table room, on the wall inbetween two chairs
-In the laundry room, on the wall next to the washing machine closest to the door
-On the wall in the entry way to the power
-Behind the shelf, next to the door in the building with the grenade wall buy
-In the room to the right of jug on one of the wooden pillars

Mini Perk Machines:
-Still to be found

Buyable ending:
-Under spawn, after activating all 8 buttons a free perk power up will be by double tap, and in a side room where one of the previous buttons was (still under spawn), a max ammo power up will have spawned. In that room, activate the button console to link it to core. The buyable ending (teleporter) is 10,000 points, and is located in the power room.