Grab resources
Resource gathering is listed first in the official how-to-play block. What you gather funds everything else: structures, defenses, and the supplies an expedition needs.
100 Days in the Sky Guides
Three guides cover the whole documented game loop, checked 2026-10-03. Start with the game summary below, then open the guide that matches your session.
The whole game in one paragraph
100 Days in the Sky drops up to 25 players onto floating islands with one stated mission: survive 100 days in the sky and rescue the 3 developers. You start with nothing, so you grab resources from the islands around you; resources become a base, and the official description is blunt that this — exploration plus base building — is the key to survival. A base without defenses loses its progress, so you build structures and cover your approaches before you push outward. Pushing outward is the point: the sky is a scatter of mysterious islands holding better resources and the weapons you will need, because the deeper you go, the more the fearsome foes resist. Somewhere out there are the three developers your mission names. Find them, rescue them, and keep the base alive behind you for all 100 days — that is the entire game, and every guide below is one slice of it.
The loop above is quoted from the game's own how-to-play block. What no source has ever documented — resource names, structure recipes, weapon stats, island maps — the guides handle with doctrine and criteria instead of invented numbers, and the sources page shows exactly why.
The guides
Pick the guide that matches today's problem
Each summary says what the guide covers and when to open it.
Start here
Beginner Guide
A first-session route in six steps: gather before committing, establish a usable base, add defenses, explore one island at a time, prepare a weapon before fighting, and keep the three-developer rescue visible as the long objective. Built for your first day, when every system is new and mistakes cost the most.
Use it on day 1, or hand it to a friend who just joined your server.
Decision helperResource & Survival Priority Guide
The five documented survival roles — gathering, fortifying, exploring, combat preparation, and rescue progress — each with the logic for when it is the right next move, plus an interactive priority assistant that turns your current situation into one recommended action.
Use it whenever you are standing in your base unsure what to do next.
Structures & defensesBase Building Guide
A placement and defense doctrine for the documented build system: read the build menu first, protect your access path, place and confirm one structure at a time, cover the most exposed approach with defenses, and prove the base works with a short expedition before expanding it.
Use it before your first long island trip — that is when an undefended base starts costing days.
The loop behind them
Every guide maps to a documented step
Straight from the official description — the same five steps the whole site is organized around.
Build your base with structures and defenses
The official description calls exploration and base building the key to survival, so building is a core win condition, not an optional side activity.
Explore the sky and visit mysterious islands
The map is a spread of floating islands. Trips away from base are where new resources, weapons, and rescue leads come from — and where the risk is.
Find weapons and take on fearsome foes
Combat is explicit: weapons exist and foes resist your progress. The description says to find weapons, which puts exploration before fighting.
Find and rescue 3 developers
The mission framing is in the description itself: you are sent to the middle of the sky to find and rescue 3 developers. Treat them as the long objective.
Why the guides teach doctrine, not tables
Most Roblox guide sites hand you tables: damage values, drop rates, costs. Those tables have to come from somewhere — a wiki, patch notes, a stat API — and this game has none of those sources. So the guides do the part that survives any patch: the order of operations, the decision rules, the mistakes that cost days. Where a number would go, the guides say what observation should fill it and send you to the game to measure it yourself. When the developer publishes real data, the tables get added with sources; the doctrine will still be here either way.
New to the game? Start here
Session one: follow the beginner route end to end — it ends with your first defenses placed and a tested return trip. Session two onward: keep the priority assistant open in a tab and let it route you between gathering, building, exploring, fighting, and rescue pushes. Before your first overnight trip: skim the base-building build order so your base survives the trip with you. That is the whole onboarding.
Beyond the guides
Check codes status before expecting free items (there is no code system yet), read the role-based evaluation framework before trusting any "tier list" for this game, and watch the update tracker — the game was patched on September 13, 2026, and each patch can move what the guides should say. The wiki hub maps every documented system family.