World 8 of 9
Unrailed!: Mars walkthrough
Oxygen rules as in Space, more land, and green walls with turrets that only hand tools get through.
- 2 parts · 6 steps
Compiled from 1 playthrough video and 7 guides · checked Oct 19, 2026
What each player can do here
- Gatherer: holds the axe or the pickaxe, carries wood and iron to the Storage wagon, and grabs the bucket when the engine runs hot.
- Track layer: takes finished track off the Crafter, lays it ahead of the train, clears the path when no track is ready and deals with the creatures.
If your skill levels differ: The wiki and Blueprinted both say only one player should lay track, and a lower difficulty means more resources and less unbreakable rock.Our suggestionWhen skill levels differ: give track laying to the steadier player, and let the newer player own one tool and keep resources coming. How to split the roles
Green walls and turrets
Part 1 of 2. The walls dynamite can't touch.
- GathererGreen walls ignore dynamite and take far longer to mine; break them with the axe or pickaxe.
- BothEvery level has at least one green wall to get through before the station.
- BothTurrets on the walls fire fireballs that kill anyone outside an air bubble.
- GathererSide-step a turret's shot and the fireball destroys the resources behind you, no tools needed.
Oxygen and bridges
Part 2 of 2. Same air rules as Space.
- BothWater is still replaced by oxygen from the Tank and the bucket.
- BothThere is more land than in Space, so bridges need less stone.
Sources (8)
Steps compiled from 1 playthrough video and 7 text guides, checked Oct 19, 2026, and written in our own words. We did not play the game for this guide. A step marked “single source” rests on one guide so far.
- The Review Playthrough: Unrailed! - Completing all Biomes in CoOp - No Commentary (Mars from 2:47:39)
- Unrailed! Wiki: Biomes
- Unrailed! Wiki: Strategy
- Unrailed! Wiki: Difficulties
- Blueprinted Gaming: Unrailed! Biomes and Progression (Scot, updated 6 Sep 2026)
- Blueprinted Gaming: Unrailed! Co-op and Strategy (Scot, updated 23 Aug 2026)
- Blueprinted Gaming: Getting Started with Unrailed! (Scot, updated 23 Aug 2026)
- Steam Community guide by RiptheBlood: Unrailed - Breakdown for beginners (Wayback copy)