A personal build guide and planner for Oxygen Not Included, built by Seth.
This is how I play the game — my strategies, priorities, and lessons learned from many colonies. It's just for fun. I hope it helps you get started or gives you some new ideas for your own colony.
- Phase 1 — First Cycle through Base Buildout (Cycles 1-35), fully documented with screenshots and detailed strategy notes
- Phase 2 — Mid Game sustainability plans (SPOM, water loops, cooling, oil)
- Phase 3 — Late Game advanced systems (rocketry, automation, steam turbines)
Each phase is broken into chapters with step-by-step builds, tips for new players, and screenshots from a live playthrough.
- Day 1 priorities (bathrooms before beds!)
- Base dimensions and layout (18 wide x 4 high rooms)
- CO2 management with 4-spine system
- Wild food foraging — no farms needed early
- Staggered outhouse strategy
- Smart power circuits with automation
- Strip digging with floor prep
- Underwater storage for polluted materials
- And much more
- Backend — Flask + SQLite
- Frontend — Svelte + Vite
- Styling — Wikipedia-inspired design with light/dark mode
# Backend
pip install flask
python app.py
# Frontend (in another terminal)
cd frontend
npm install
npm run devV-SNDST-C-337013521-0-V9-J3ET5