Day one of Nether Adventure: Team ScoOpBaLo has one Minecraft day to gather what it can, then builds a portal by a lava lake, steps through and seals it shut.
Day six of Underground: Team MaBaSteeSco digs a kill room off the zombie spawners, builds an enchanting table, poses for a group shot and starts lining up bottles for potions.
Day five of Underground: Team MaBaSteeSco gathers blaze rods, loots fortress chests and carries nether wart home, then Basket digs into new caves and finds diamonds.
Day four of Underground: Team MaBaSteeSco moves its gear to the spawner rooms, casts a nether portal from lava and water, and Basket digs into a nether fortress where the fire comes through the walls.
Day three of Underground: Team MaBaSteeSco argues over where to live, breaks into a room full of zombies around a spawner, and finds a second one close by.
Day two of Underground: Team MaBaSteeSco smelts a pile of iron into armor, dodges creepers in a deep shaft and goes looking for redstone to make a clock.
The last day of Mission Impossible. Basket and Max_Writer enchant their gear, clear a mineshaft, build iron golems and a ticking clock, and sign off with the stronghold as home.
A witch ends lostinthefort's run two minutes in. Basket and Max_Writer carry on alone, hunting diamonds for an enchanting room and lighting a wall of furnaces in the stronghold.
The three survivors gear up, head down into the ravine beside the stronghold and work through a mineshaft and its caves, with the lag following them all the way.
With Steel_Douglas gone, the three survivors fetch seeds from a chest they left behind, grow giant mushrooms in the floor and start making the stronghold home.
On day four Team MaBaSteeLo packs up the cave, crosses the ice spikes and digs down into the stronghold, where endermen, skeletons and creepers are waiting.
On day three Team MaBaSteeLo goes back to the Nether for mushrooms, finds gold in a ravine and grows giant mushrooms big enough to pack for the stronghold trip.