Sector 4 of *Pragmata*, known as the **Lunum Mines**, contains a total of 45 collectibles required for 100% completion. These collectibles include Mini Cabin Buddies, Safe Boxes, Pure Lunum, Read Earth Memories (REM), Mods, Storage Expanders, and Training Data.

### Collectibles Overview
To achieve 100% completion in the Lunum Mines, you do not need to collect every single file or hologram in the environment. Focus on the following key categories:

* **Mini Cabin Buddies:** 3 total
* **Safe Boxes:** 17 total
* **Pure Lunum:** 4 total
* **Read Earth Memories (REM):** 3 total
* **Mods:** 7 total
* **Storage Expanders:** 2 total
* **Training Data:** 2 total
* **Escape Hatches:** 7 total

### Important Notes on Collection
* **Non-Missable:** No collectibles in this sector are permanently missable.
* **Backtracking:** Some areas require specific story-related skills (such as the Limb Cleanser) to access. If you cannot reach a collectible during your first playthrough, you can return to the area after completing the story using “Unknown Signal” (Cleanup) mode.
* **Red Zones:** While some Red Zones are physically located within Sector 4, their rewards may count toward the completion totals for Sector 5.

### Key Locations and Strategy
The Lunum Mines are divided into several sub-areas. Below is a breakdown of where to find key items:

#### Mine Entrance
* **Mod:** Found in a small cave to the right after the first elevator ride; requires erasing a “bad limb” to access the chest.
* **Safe Boxes & Storage Expander:** Several are located in the initial mining tunnels; look for chests behind destructible obstacles.

#### Crane Operation Yard
* **Mini Cabin Buddy:** Located near the crane operation area; watch for it on a pipe or ledge.
* **Mods:** Two mods are found here, often requiring the use of the crane to drop containers and create new paths.

#### Warehouse
* **Pure Lunum:** Found in chests within the warehouse area.
* **Safe Boxes:** Multiple boxes are hidden in this section, often requiring you to stack movable crates to reach high ledges.
* **Training Data:** Located near the zipline exit point.

#### Main Excavation Site
* **Eagle Eye Mod:** Located in a room that can only be accessed by jumping onto the roof and pushing panel boxes to create an opening.
* **Read Earth Memory:** Found behind a broken wall near the exit door; jump on orange fuel canisters to reach it.

#### Nexus Tower
* **Final Mini Cabin Buddy:** Look up and to the left along the tower wall near the window.
* **Safe Boxes:** One is accessible by gliding over a gap past the shelter ladder; another is hidden behind a fake wall in the bottom tunnel.