Red Gate Keys unlock the Red Zones scattered across the Cradle — time-pressured combat areas gated behind red terminals. Every Red Zone hides Pure Lunum or a top-tier Safe Box, so the keys are one of the most directly valuable collectibles in the game.
What They Are
A Red Gate Key is a small red card you slot into a Red Zone terminal to open its shutter. Once inside, you're on a timer with stronger enemies and a fog effect — clear or escape before the timer runs out and the rewards (almost always Pure Lunum or a Safe Box stuffed with Mods and Upgrade Components) are yours to take.
There are two ways to earn Red Gate Keys:
- Find them in the world — a handful are sitting in side rooms you pass during the main story.
- Earn them from Cabin Stamp Club — fill specific rows on the Stamp Club board back at Shelter and a Red Gate Key drops into your inventory.
Total Count
You can collect 4 world-placed Red Gate Keys (one each in Sectors 2, 3, 4, and 6), plus 5 additional keys from the Cabin Stamp Club board — enough to open every Red Zone in the game.
World Locations
Sector 2 · Shopping District
- Inside the café in the Shopping District. Walk in past the food-stall loop and it's on the counter.
Sector 3 · Eco Modeling Lab
- Past the second universal chip, climb to the upper corridor lab. The key is sitting on a laptop on one of the desks.
Sector 4 · Main Excavation Site
- Inside the laboratory at the Main Excavation Site, right next to the Logistics Management Escape Hatch.
Sector 6 · Research Sector
- Take the second elevator up to the Research Sector. The key is in the first room you walk into.
Cabin Stamp Club Keys
The Cabin Stamp Club (集币板) at Shelter tracks small achievements — trophies and milestones fill cells on a grid. Completing specific cells awards a Red Gate Key:
| Key | Stamp Club Row / Column |
|---|---|
| Stamp Key 1 | Row 2, Column 3 |
| Stamp Key 2 | Row 4, Column 3 |
| Stamp Key 3 | Row 2, Column 2 |
| Stamp Key 4 | Row 4, Column 2 |
| Stamp Key 5 | Row 2, Column 3 (second board) |
Check the Stamp Club kiosk at Shelter after every sector — several cells tick over as you hit story beats, and these keys often appear without you noticing.
Tips
- Don't blow your first key on a tutorial Red Zone. Wait until you've printed a reliable loadout — the time limit is punishing early on.
- Red Zones hide almost all Pure Lunum. If you care about the Unit Printer late-game builds, you care about Red Gate Keys.
- Check Stamp Club after every story beat. You'll pick up stamp cells just by playing — the free Red Gate Keys are easy to miss if you don't look.
- Save your last key for Sector 6. The Lunafilament Lab Red Zone drops the game's densest Pure Lunum payout.
See Also
- Pure Lunum — the main reason Red Gate Keys exist
- Safe Boxes — several of the best ones live inside Red Zones
- Walkthrough · Sector 2 — the earliest Red Gate Key run