Buried:
Easter Egg

1. Build the guillotine, beside the Saloon. Parts: the satellite dish upstairs in the Saloon near the fence, the spool of wire in a corner downstairs in the Gunsmith by the catacombs entrance, the crystal in the debris of the tunnels above the Saloon, and the antenna in one of the stables downstairs in the Barn.
2. Charge four red orbs with the Paralyzer: in the alley between the Saloon and the Candy Store, behind a rock left of the church entrance, in the tunnels above the town, and in the foliage before the mansion’s maze entrance.
3. Catch the lantern: a purple lantern floats from the Courthouse to the church or to the jail. Knock it down with a grenade and pick it up. Then kill at least ten Ghosts in the mansion to fill it, and place it on the symbol on the roof of the Gunsmith.
4. Read the code: the symbols above the lantern use a tic-tac-toe cipher. Decode only the first letter of each word: it names three of the five tunnel signs (Dry Gulcher Shaft, Lunger Undermines, Consumption Cross, Ground Biter Pits, Bone Orchard Vein). Hit those three with the Galvaknuckles or the Bowie Knife, in any order.
5. Guide the wisp: a wisp appears that only players with Vulture Aid can see. Walk through it within 15 seconds each time to move it along its path, from the tunnels to the Barn, the jail, the General Store and the Gunsmith, until it stops in front of the guillotine. Kill zombies next to it until orbs circle the crystal. Richtofen then asks for a Time Bomb.
6. Find the switch in the future: with four players around the guillotine, plant a Time Bomb on its bench and set it off. The game jumps to round infinity, in black and white, with near-invincible zombies. In 60 seconds, search the dead bodies of Misty, Marlton, Samuel and Russman for the switch, then place it on the guillotine once back in the present.
7. Pull the maze levers: four coloured levers (red, green, blue, yellow) hang on gates in the maze. All four must be pulled in the right order, found by trial and error; the right ones spark once all four are down.
8. Make a wish: use the fountain in front of the church and the mansion. Metal targets appear in four places (by the Candy Store and Courthouse, the mansion windows, inside the Saloon, by the jail), and every target must be shot before they vanish. The Paralyzer works on them.

1. Build the gallows, next to the Courthouse entrance. Parts: the battery behind the church altar, the spool of wire in a corner downstairs in the Gunsmith, below Mule Kick, by the catacombs entrance, the antenna in a stable of the Barn, and the bulbs on boxes in the room above Leroy’s cell.
2. Destroy the four red orbs with the Subsurface Resonator, powered by a Turbine. They are in the same places as on Richtofen’s side.
3. Knock down the lantern with a grenade, as on the other side. It vanishes if you miss it for too long, or leave it on the ground.
4. Sugar rush: fill the lantern by killing zombies close to its holder with Leroy on Candy, the Trample Steam, the Subsurface Resonator, the Head Chopper or a Nuke. Then place it on the roof of the Gunsmith.
5. Decode the signs and hit the three tunnel signs, as on the other side, in order this time.
6. Escort the wisp, twice: plant a Time Bomb first, open the 1250-point couch between the tunnels and the Gunsmith, and have Leroy break the barrier between the General Store and the Candy Store. Follow the wisp from the tunnels through the jail, the Barn, the Gunsmith and the Saloon to the gallows, keeping zombies close to it all the way or it fades. Then set off the Time Bomb and do it again for a second wisp.
7. For whom the bells toll: nine bells hang in three places, three upstairs in the Candy Store, three on the top floor of the Barn, three on the ground floor of the Courthouse. A switchboard behind the secret bookcase in the mansion lights them one at a time; one player calls them out while the others ring each bell in time.
8. The final wish: use the fountain and shoot every target, exactly as on Richtofen’s side.

Either side, once finished, gives every player all the perks for the rest of the game and the Mined Games achievement. One step remains to end the story.