Sector 3 of *Pragmata*, known as the **Terra Dome**, is a significant area containing 47 collectible items. Because some areas require specific skills or abilities—such as the Cleansing ability—that may not be unlocked during your initial visit, it is often necessary to return to this sector via “Unknown Signal Mode” (post-story cleanup) to achieve 100% completion.

### Collectibles Overview
The 47 collectibles in the Terra Dome are categorized as follows:

* **Safe Boxes:** 20
* **Escape Hatches:** 6
* **Pure Lunum:** 6
* **Mods:** 5
* **Read Earth Memory (REM):** 4
* **Mini Cabins:** 3
* **Training Data:** 2
* **Storage Expander:** 1

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### Key Sub-Area Breakdowns

#### Terra Dome Entrance
This area contains a high density of items, some of which require looping back via the elevator.
* **Safe Boxes:** 5 total. Safe Box 1 is located outside the main building; jump onto the hanging crate to reach the grassy ledge where it is hidden.
* **Notable Items:** Includes Mod 1 (Cheap Shot), Mod 2 (Precision Shot), REM 1 (Flowers), and Training Data 1.

#### Eco Modeling Lab
* **Mini Cabin #1:** Found on a tree branch above the terminal that grows the tree platform, located on the right side of the room.
* **Safe Boxes:** 5 total. One is located behind a Holo-Wall in the first area of this block.
* **REM:** Includes REM 1 (Balloons) and REM 2 (RC Car).

#### Soil Research
* **Mini Cabin #2:** Appears after the invisible enemy encounter; take the elevator up, run along the balcony, and aim at the trees to the left.
* **Safe Boxes:** 10 total. These are scattered throughout; some require specific pathing or clearing jammers.
* **REM #4 (Swing) & Mini Cabin #3:** These are located in a locked room. To access it, enter the door next to the weapon rack, go around the left corner, use the eraser ability, and climb up.

#### Terrarium
* **Pure Lunum & Storage Expander:** These are found in this final sub-area.

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### Important Tips for Completion
* **Nothing is Missable:** If you cannot reach a collectible during your first playthrough, you can return to the Terra Dome at any time after completing the story using Unknown Signal Mode.
* **Ability Gating:** Certain collectibles, specifically Safe Boxes 8 and 9 and one instance of Pure Lunum, require the **Cleansing ability**, which is unlocked automatically during the “Central Port 01” story mission.
* **Pathing:** In areas with branching paths (such as the A/B path splits in the Entrance), you must explore both branches to collect the items located at each terminus.