Guts & Blackpowder secret Achievement 4.
Alone, at the end of the world.

In order to get this badge, you need to survive 20 waves of Endless alone, this unlocks the French Fork Beard, and the Red Tinted Glasses.

After getting this achievement, i’ve beaten the game once again, ill now go back to being dormant until the next major update, and get it’s respective badges.