Here is a simple guide on how to get all secrets, easter eggs and achievements. Spoiler Alert!!!
Secrets / Easter Eggs
Open the Press tool and hover over the blank squares to the left of each ammo type. It’s hidden in one of them. Crafting only requires a small amount of wood and metal.
What’s with the “Georgie” sewer?
Place items in the sewer where the first letter of each object spells out “Clown”. Try not to freak out.
Where do you get a Holy Sword?
The burnt cross outside of the church is where you can summon the Banshee boss (if the cooldown timer isn’t active). This boss generally requires 2 mags of ammo and plenty of health kits to beat. Once dead she drops the Holy Sword and some additional loot.
Pro tip: turn down your audio and prepare for AOE attacks.
Played DeadPoly during Early Access.
Did You Just Start The Zombie Apocalypse?
Because I’m pretty sure you just started the zombie apocalypse.
Play the demo and leave the bunker. If you get this achievement you cannot get “It Was A Nice Thought”.
It Was A Nice Thought
Play the demo and stay in the bunker after completing the tutorial. If you get this achievement you cannot get “Did You Just Start The Zombie Apocalypse?”
The Goodest Boy
Man’s best friend.
Climb the pet store near the downed helicopter (not the one near the motel). Atop the roof is a large dog statue; stand next to it.
Two If By Sea
Light the way.
Climb to the top of the lighthouse. You may need to be holding a Lantern Flashlight (unconfirmed).
In Cardboard We Trust
All it takes is a little imagination.
With full health and while wearing a cardboard wings accessory; jump from a tall height and survive the fall (should only have a small amount of HP left).
Crash Test Dummy