Research order, from the game's own tech tree

These tiers are not opinion: tier N research requires something from tier N−1, exactly as the game wires them. Within each tier we list the entries that unlock the most first.

90 Research entries
9 Prerequisite tiers
29 Decoration-only

Tier 0

Available immediately — no prerequisites.

Decoration packs in this tier (1)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

  • Iron Rod 3× Wood, 3× Stick, 3× Cloth, 1× Iron, 1× Blueprint

Tier 1

Each entry here requires research from an earlier tier.

Decoration packs in this tier (2)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

Tier 2

Each entry here requires research from an earlier tier.

Decoration packs in this tier (3)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

Tier 3

Each entry here requires research from an earlier tier.

Decoration packs in this tier (4)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

Tier 4

Each entry here requires research from an earlier tier.

Decoration packs in this tier (3)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

Tier 5

Each entry here requires research from an earlier tier.

Decoration packs in this tier (3)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

Tier 6

Each entry here requires research from an earlier tier.

Decoration packs in this tier (4)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

Tier 7

Each entry here requires research from an earlier tier.

Decoration packs in this tier (5)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

Tier 8

Each entry here requires research from an earlier tier.

Decoration packs in this tier (4)

These only unlock furniture and decoration recipes — take them in any order, they never block progression.

How this order is derived

Tiers follow the game's own unlock chains: an entry's tier is the longest prerequisite path above it. "Unlocks the most first" sorting counts UnlockingRecepieIDs plus UnlockingResearchIDs per entry. The decoration split uses the entry's own ResearchType field (the game's EItemType enum). The only editorial judgment on this page is the within-tier emphasis; every gate, cost and count is game data.