Grain Rot Quest Guide — Little Buddy, the Second Floor Key and Dr. Quill

Quests in GRAIN ROT are the game's way of teaching you the surface, the Outpost, and the Deep Layers in a fixed order. The structure lives in the descent loop, but the story moves through NPCs at the Outpost, and the two quests players get stuck on are the same two this page covers in detail: the Little Buddy rescue and the Second Floor Key. This grain rot quest guide follows the credited community wiki's chain from the opening housekeeping through Dr. Quill's records quest, and marks everything that rests on community documentation rather than an official patch note. Rewards beyond the narrative beats are mostly undocumented, so they are deliberately left out rather than guessed.

This page is compiled from the credited community documentation and the official Steam listing; details that rest on a single source are marked to confirm.

The Opening Quest Chain

The first hour is a guided sequence from Biggy and Murch, and the credited wiki frames it as a tutorial that also unlocks the tools you will use for the rest of the game. Clean Up asks you to buy a broom and sweep three dirt piles, with the stated reason that dirty floors and broken walls lower Outpost morale. Fixer Upper has you repair the broken walls for the same reason. Break & Build introduces the demolition mallet and the artifact-coin economy, where coins go into the gumball machine, the result goes into the opener, and a construct blueprint comes out. Explore the Deep Layers sends you down for the first real run, and the upgrade objectives that follow are where the Outpost turns those gains into permanent power.

Quest	What it asks	Resource cost
Clean Up	Buy a broom, sweep three dirt piles	25 Gold for the broom
Fixer Upper	Repair broken walls	50 Scraps per wall
Break & Build	Demolish objects, craft constructs	Tutorial gear
Explore the Deep Layers	Complete a first descent	Carried currency resets
Upgrade objectives	Spend returns on shop and rooms	Your Scrap and Gold

The economy loop the tutorial is really teaching:

• Artifact cards feed the ball machine, which produces artifacts.
• Artifacts go into the opener to produce construct blueprints.
• Blueprints unlock furniture you can build anywhere.
• Gold buys tools and weapons from Murch, and Scrap pays for repairs.

Little Buddy and the Second Floor Key

Little Buddy is the quest players search for most, and the credited wiki is specific about why they fail. Biggy asks you to bring back a friend he met in the layers, a small construct he calls Buddy and refers to as her. She only spawns from around layer three onward, so hunting on layers one and two is a waste of time. She spawns in a room close to the elevator rather than deep in the map, so once you are deep enough, circle the elevator either direction and you will find her room. She has 250 HP and constantly restores her own health and yours, which means she is hard to lose to chip damage, but the Corrupted do not attack her, so the real threats are pits, traps, and the noise your own escort draws.

Step	Detail	Common mistake
Reach the depth	Layer three or deeper	Searching layers one and two
Find her room	Circle the elevator left or right	Going deep into the map
Escort her	Walk, do not sprint, so she keeps up	Running ahead and losing her
Extract together	She must ride the elevator with you	Extracting alone and failing the quest

The Second Floor Key follows immediately, and the credited guide explains why it is more generous than the rescue. The key can appear on any layer from floor one upward, so the efficient route is to reset to floor one, where enemies are easy and the shop restocks. It always sits in a small alcove near the elevator, and the landmark is a furniture cluster of a box, a light, a table, and a plant. Grab it, ride up, and unlock the door, which opens the upstairs stations, Tink, the upgrade machines, and a free umbrella on the balcony. The umbrella is functional rather than decorative, because the surface sun burns wooden vessels, and the surface is exactly where the next quest sends you.

Dr. Quill and the Records

Dr. Quill's quest is the other common dead end, and it starts with a step players skip. He lives in the first house on the left out of the safehouse, and you have to go down into the basement and accept the quest before anything else, because walking to the objective first leaves you with nothing actionable. The quest then sends you up to the scorched surface toward an old radio tower, and the stumble is always the same: the entrance is not in the tower. You circle the tower's base until you find a ground hatch at its foot, and inside is the Ancient Facility, a loop of rooms holding ten readable records. Work the circle, interact with every record, and when you are stuck at nine of ten, check the reachable areas near the locked door, because the last record tends to sit near it rather than behind it. At ten of ten the objective flips to returning to Dr. Quill, and the wiki notes the rewards for this line are not yet confirmed by any source it trusts.

The key preparation for that trip is not combat gear:

• Take an umbrella, because Quill's errand is the first route where the sun burns you.
• Accept the quest in the basement before walking to the objective.
• Search the tower's base for the hatch instead of the tower itself.
• Check near the locked door when you are one record short.
• Return to Quill only when the counter reads ten of ten.

Beyond these beats, the credited wiki is explicit that quest rewards, unlisted side quests, and exact tables are undocumented, and that patches 1.01 through 1.07 changed none of these steps. For the systems these quests unlock, the third-floor page covers the optional climb, and the building page explains what to do with the rooms the Second Floor Key opens.