Sector 4 of Pragmata, known as the **Lunum Mines**, is a dense industrial area on the lunar surface. To achieve 100% completion in this sector, you must locate all 45 collectible items, which are divided into several categories: Safe Boxes, Mods, Read Earth Memories (REM), Mini Cabins, Escape Hatches, Pure Lunum, Training Data, and Storage Expanders.

## Sector 4 Collectible Overview
* **Safe Boxes:** 17
* **Mods:** 7
* **Read Earth Memories (REM):** 3
* **Mini Cabins:** 3
* **Escape Hatches:** 7
* **Pure Lunum:** 4
* **Training Data:** 2
* **Storage Expanders:** 2

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## Block 01: Mine Entrance
This initial area introduces the LunaDigger hazard. Some items here require the **Cleanse** ability or **Lim Eraser**, which may require backtracking in “Unknown Signal” mode (post-game).

* **Mod 1 (Equilibrium):** Located on the lower floor level after the first thruster jump section. Look behind a cluster of crystals on the right side that must be erased.
* **Safe Box 1:** In the first combat arena, jump up the platforms at the far back to find this box.
* **REM 1 (Campfire):** After exiting the first building and using thrusters to cross the gap, look between the set of broken stairs.
* **Storage Expander 1:** *Requires Backtracking/Cleanse.* To the right of the LunaDigger encounter area, cleanse the corruption to reveal a pit. The expander is at the bottom.
* **Safe Box 2 & 3:** *Requires Backtracking/Cleanse.* Located in the same secret pit as the Storage Expander.

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## Block 02: Crane Operation Yard
This area focuses on verticality and mechanical puzzles.

* **Escape Hatch 1:** Found inside the Crane Control Room.
* **Mod 2 (Analog Aggression):** Also located within the Crane Control Room near the hatch.
* **Safe Box 4:** On the exterior walkway leading away from the control room.
* **Mini Cabin 1:** Tucked behind a stack of crates near the second crane pillar. You must shoot it to collect it.
* **Safe Box 5:** Underneath the main crane platform, accessible by dropping down to a small ledge.
* **Safe Box 6:** Near the exit of the yard, tucked behind a yellow industrial generator.
* **Mod 3 (Digital Dominance):** Located on a high ledge above the exit door; requires a precise thruster jump.

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## Block 03: Warehouse
The Warehouse is a large interior space filled with high-tier materials.

* **Escape Hatch 2:** Right at the entrance of the warehouse.
* **REM 2 (Bug Net):** Found on a shelf in the first storage room on the left.
* **Safe Box 7:** Behind a stack of “Delphi” branded containers in the main hall.
* **Mod 4 (Nice Nodes):** On the second-floor catwalk, accessible via the freight elevator.
* **Safe Box 8:** Inside a small office overlooking the main floor.
* **Pure Lunum 1:** Found in a locked locker that requires a basic hacking node to open.
* **Safe Box 9 & 10:** Located in the basement maintenance tunnel.
* **Mini Cabin 2:** Hiding inside a ventilation duct in the basement.
* **Safe Box 11:** Near the exit of the warehouse, behind a pile of scrap.
* **Training Data 1:** Found on a terminal in the final room before the exit.
* **Escape Hatch 3:** Located at the warehouse exit.
* **Red Zone (Storage Expander 2 & Pure Lunum 2):** Requires the Red Zone Key (found in Block 04). Once obtained, return here to clear the combat challenge for these items.

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## Block 04: Main Excavation Site
This is the largest open area in the sector and contains the Red Zone Key.

* **Escape Hatch 4:** Inside the Mining Control Room.
* **Mod 5 (Eagle Eye):** Found on the desk inside the Mining Control Room.
* **Safe Box 12:** Located on the roof of the Mining Control Room.
* **REM 3 (Tent):** Found in the “Rest Area” section, sitting on a bench near the lockers.
* **Red Zone Key:** Obtained automatically after the scripted encounter with the LunaDigger in the Logistics Management area.
* **Escape Hatch 5:** Located in the Logistics Management hub.
* **Safe Box 13 & 14:** Found in the lower excavation pits, guarded by several Sweeper bots.
* **Mod 6 (Synaptic Response):** Located on a crane arm hanging over the central pit.
* **Pure Lunum 3:** Tucked behind a large mining drill at the bottom of the site.
* **Safe Box 17:** *Requires Cleanse.* Located in the Logistics Management area; look for a corrupted wall that can be cleared.

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## Block 05: Nexus Tower
The final stretch of the sector leading to the boss.

* **Training Data 2:** On a terminal at the Tower Access Point.
* **Escape Hatch 6:** Located at the base of the Nexus Tower.
* **Mini Cabin 3:** Perched on a support beam halfway up the tower.
* **Safe Box 15 & 16:** Found on the exterior balconies of the tower.
* **Escape Hatch 7:** Located just before the Mainframe Access door.
* **Red Zone (Pure Lunum 4 & Mod 7: Economize):** Requires the Red Zone Key. This is the final combat challenge of the sector, located near the Tower Access Point.

## Completion Tips
* **Object Scan:** Once you reach Shelter Level 2, ensure you print the **Object Scan Ability**. This will highlight all nearby collectibles (except Mini Cabins) through walls.
* **Unknown Signal Mode:** If you miss any items due to lacking the **Lim Eraser** or **Cleanse** abilities, you can return to any block via the Tram system in the post-game “Unknown Signal” mode.
* **Mini Cabins:** These are the only collectibles that do not appear on the scan. Listen for a faint mechanical “chirping” sound to locate them.