Bigger On The Inside is the fourth level of Episode 1: American Dream Gone Wrong in Postal Brain Damaged. This page shows where to find every secret and poster in the level, with a screenshot for each one.
Postal Brain Damaged: Bigger On The Inside Walkthrough
Episode 1, Level 4: Bigger On The Inside
Bigger On The Inside has 3 secrets and 6 posters. The last poster sits past a point of no return, so collect everything else before you take the final platform.
Secret #1: Hot Sauce
Start by peeing on the bridge so it lowers for later. Then grapple over the electric gate and follow the path down until you drop into a room with walkways, grapple rings and enemies.
Look above the second grapple ring for a duct. Grapple from just underneath the ring and it flings you up into the vent, where a bottle of Hot Sauce is waiting.
Poster #1: Basement Dweller
Clear the enemies and move on. You end up directly below the spot where you started the level. Grab the poster here, then flip the switch to start the air vent that lifts you up to the red door above.
Secret #2: Wednesday Frog
Make your way back to the electric gate and activate the switches on both sides. A walkway appears. Walk up it and turn around to find a grapple point.
Grapple onto it and you land on the rafters. There are openings on the left and on the right. Go into each one and pull the pink lever inside.
Once both levers are down, a new grapple point appears near where you started the level. Grapple straight up to it to reach the secret.
The frog inside is tied to two achievements: one for using it on a Wednesday and one for using it on any other day.
Poster #2: Lightfifty Sir
Take the path that has just opened and drop into a room full of enemies. Turn around as soon as you land: the poster is on the wall next to the way forward.
Poster #3: Bigger On The Inside
Later you reach a long room with many launch pads and enemies. Find the pad near the Monkey From Hell that keeps summoning smaller monkeys. Ride it all the way up to a platform that holds the poster.
Poster #4: Mr. Toot
Clear the launch pad room, go down the pipe for the blue key in the case, drop back down and open the blue door. The poster is straight ahead. Watch for the crawling dolls that come out of the vent on the left.
Secret #3 / Poster #5: Annoying Monkey
Keep going until you reach a door with two Cusslingers and a Burger Boy behind it. Once they are dead, turn around to find a grapple point. Grapple up to it for the secret and the poster.
Poster #6: Gun Goes Brr
The final poster is at the very end of the level, past a point of no return. Before you go through the door with yellow and blue stripes opposite the Burger Boy fight, make sure you have everything else.
The door leads to a chapel with the Gun Goes Brr minigun. Two wizards and two dogs ambush you. Pick up the pink lever and find the slot it fits into.
After you pull the switch and step onto the platform with the minigun, there is no way back. The platform rises and waves of enemies spawn as you move forward, with free minigun ammo along the way. The poster is at the end; pick it up before you jump off to finish the level.
Back to the Episode 1: American Dream Gone Wrong walkthrough for the other levels in this episode.