Choose a route by your current objective
AETHUS guides
New players start with the beginner guide. Stuck on a door, use quests. Chasing 100%, use the achievement list. Story and the ending are separate pages so spoilers stay off this one.
These routes are compiled from public guides, official patch notes and achievement descriptions. Community guide pages returned HTTP 429 in this review. Their earlier research record is identified where used; publisher claims and community recommendations are kept distinct.
Choose your next step
On a new save, establish a return point near the cave, keep an oxygen margin and build refining capacity before planning long descents. These are editorial priorities informed by community guides. Game Modifiers can be changed during a save; patch 1.029 also adds a Resources drop-rate option.
| Your goal | Open this guide | What it answers |
|---|---|---|
| First camp and upgrades | /guides/beginner-guide/ | An early route and inventory controls |
| Outpost layout | /guides/base-building/ | Connections, power, water and storage |
| Story progression | /guides/walkthrough/ | Milestones, keycards and likely blockers; spoilers folded |
| A specific objective | /guides/quests/ | Access Denied, Inner Glow, Matter Folder and Jenkins |
| Completion | /guides/achievements/ | All 40 names and unlock conditions |
| Can friends join? | /guides/multiplayer/ | Single-player and Remote Play distinction |
| Survival pressure | /guides/difficulty/ | Air, Vitality, Carry Weight and Resources |
When a door or recipe blocks progress
Match the facility and objective before trying a code. A locked crate, an unpowered relay and a story-gated door are different blockers. Use /codes/ for named puzzle solutions, /map/ for facility directions and /materials/ for crafting inputs. Keep a spare save before the finale; the walkthrough and ending sections contain spoilers.
Video
Official gameplay trailer from the press-kit set. Upload date 2025-10-02. The player loads only after you press play.
Questions
Is there an official strategy guide?
No. The routes here cite Steam community guides, Steam news, and named videos.
How long is the game?
HowLongToBeat lists 30 hours 45 minutes for the main story from 4 players. See the length page before you treat that as exact.
Related
Sources
- Steam guides — Seven community guides.
- HowLongToBeat — 30h 45m, 4 samples.
- Steam store — Single-player tag.
Last checked: 2026-10-28. Send corrections to [email protected].