Milestones/sandbox

Milestones are the primary method of progression in the game, allowing the pioneer to unlock new buildings, recipes, equipment, and more. They can be completed at the HUB Terminal by inputting the specified resources. To do so, move near the terminal (the PC-shaped booth inside the HUB), interact with it, then + the required material in your inventory. 
Sets of milestones are grouped into tiers. At the start of a new game session, only Tier 0 is available (unless Onboarding is skipped, which will skip Tier 0 as well). Completing Tier 0 unlocks Tiers 1 and 2, and completing phases of the Space Elevator unlocks higher tiers.
Parts inserted into the HUB Terminal cannot be taken back.
== Tier 0 ==
Tier 0 focuses on upgrading the HUB. Unlike milestones in later tiers, these must be completed in sequential order. Each milestone changes the HUB's appearance as well.
* Note: The two Biomass Burners that are added to the HUB are smaller than the standalone version, each only produces 20 MW instead of 30 MW. They also burn fuel proportionally slower.
== Tier 1 ==
Requirements: All Milestones from Tier 0 completed (The HUB is completed) or Onboarding is skipped
== Tier 2 ==
Requirements: All Milestones from Tier 0 completed (The HUB is completed) or Onboarding is skipped
== Tier 3 ==
Requirements: Space Elevator Phase 1 completed
==Tier 4==
Requirements: Space Elevator Phase 1 completed
==Tier 5==
Requirements: Space Elevator Phase 2 completed
==Tier 6==
Requirements: Space Elevator Phase 2 completed
==Tier 7==
Requirements: Space Elevator Phase 3 completed
==Tier 8==
Requirements: Space Elevator Phase 3 completed
==Gallery==
File:Terminal_UI.png|The UI of the HUB Terminal, displaying selected tier, milestone, rewards, and milestone cost. The option grayed out as the milestone is completed.