PragmataGuide
Unknown Signal Hidden Chamber Verified Apr 22-24, 2026

Post-Game / Unknown Signal Rewards

Pragmata Unknown Signal Rewards Guide

This page focuses on the stable reward side of Unknown Signal: the Architect's vault prize pool, the Secret Mission rewards that matter most, and the exact post-game items tied to the Black Box ending route.

Reward Table Vault Rewards Best Route
10 Secret Missions
Current post-game guides agree that Hidden Chamber contains 10 Unknown Signal missions or pods.
3 stable vault rewards
The safest final reward list is `Lim Cannon`, `Black Box Mod`, and `Obsidia` outfits.
Mission rewards and vault rewards are different layers
Secret Missions can pay out mods, resources, or the Shelter key before the Architect's vault opens.
Outfit naming is the main community friction point
Stronger sources agree on `Obsidia`, while some weaker/community coverage also mentions `Black Neon`.

// Final Loot

Architect's Vault

The strongest source overlap puts the biggest Unknown Signal rewards behind the Architect's vault, which opens only after the full Secret Mission chain is cleared.

// Staged Rewards

Mission-By-Mission Upside

Unknown Signal is not just one big reward chest at the end. Current reward coverage also ties several mods, resources, and a late Shelter key upgrade to the broader Secret Mission chain before the vault opens.

// Ending Route

Black Box Relevance

The `Black Box Mod` is the reward that matters most to story-completion users, because it is the final item that turns Unknown Signal progress into the extra ending sequence.

// Reward Table

Unknown Signal Reward Layers

The cleanest way to understand Unknown Signal rewards is to split them into mission chain rewards and Architect's vault rewards. That avoids mixing the final payoff with the mods and resources you get earlier.

Reward Layer What Is Stable Examples Why It Matters
Secret Mission rewards Current reward coverage ties several mods, resources, and the late Shelter key upgrade to the Secret Mission chain. Sympathetic Hacking Slowdown Grace These shape your post-game build before the final vault is even open.
Architect's vault The strongest final reward overlap is the `Lim Cannon`, `Black Box Mod`, and `Obsidia` outfits for Hugh and Diana. Lim Cannon Black Box Mod Obsidia outfits This is the headline reward pool most players mean when they ask about Unknown Signal rewards.
Ending extension Equipping the `Black Box Mod` for the final boss rematch is what converts the post-game route into the extra ending payoff. Narrative-only trigger It is the reward that matters most to completionists and story-route users.

// Final Rewards

Architect's Vault Rewards

The most stable final reward list is the one repeated by GamesRadar+ and echoed by follow-up Black Box coverage: Lim Cannon, Black Box Mod, and Obsidia outfits for Hugh and Diana.

`Lim Cannon` is the gameplay reward, `Black Box Mod` is the narrative-critical reward, and the `Obsidia` outfits are the cosmetic reward layer. That makes the vault a clean blend of build, style, and ending progression.

Safe wording:
Some community-style sources also mention a `Black Neon` outfit name in this reward cluster, but the highest-confidence overlap for this page stays with Obsidia.

// Mission Rewards

Documented Secret Mission Reward Pool

This table stays narrow on purpose. It only includes the named post-game rewards that current public coverage associates with the Secret Missions, rather than speculating about every chest or hidden pickup.

Reward Type Documented Reward What It Does Confidence Note
Opening Hidden Chamber clear Shelter License Key Level 5 This is the late Shelter upgrade key that unlocks the final upgrade tier for post-game progression. The strongest overlap places the level 5 key in the first Hidden Chamber mission chain, even when different guides use slightly different mission labels.
Named Hacking Mods Sympathetic Hacking Slowdown Grace These support stronger hacking loops, including instant Primary Unit reloads, time-slow during hacks, and passive Hacking Gauge recovery. The mod names and effects are stable. The exact mission-by-mission mapping is less consistent outside the strongest launch-week reward guide.
Named Defense / Support Mods Better Lucky Cyber Thief These broaden the post-game reward pool with defensive utility and better Lunafilament farming. Current guides consistently place both in the Secret Mission reward pool, but exact mission labels are safer to treat as version-sensitive.
Multiple Secret Missions Lunafilament Pure Lunum Cabin Coins Current reward coverage also notes broad resource payouts from end chests and some hidden Safe Boxes. Exact quantities vary, so this page keeps the statement qualitative rather than numeric.

// Unlock Logic

Mission Unlocks And Reward Planning

The current high-confidence unlock chain is straightforward: `Alpha` is available immediately in the Hidden Chamber, and the remaining missions branch off sector `100%` completion or Enhanced boss clears.

Mission Unlock Condition
AlphaUnlocked automatically upon reaching the Hidden Chamber.
BetaDefeat Enhanced SectorGuard.
Gamma100% Solar Power Plant.
DeltaDefeat Enhanced Creator.
Epsilon100% Mass Production Array.
ZetaDefeat Enhanced Garden Keeper.
Eta100% Terra Dome.
ThetaDefeat Enhanced LunaDigger.
Iota100% Lunum Mines.
Kappa100% Central Port.

Best Practical Read

  • The first Hidden Chamber mission matters immediately because it is the clearest early route to the late `Shelter License Key Level 5` upgrade.
  • The `100% sector` missions are not just ending chores. They also feed the broader reward pool, so reward-focused players should not put them off forever.
  • Once all 10 are done, the Architect's vault becomes the real finish line for rewards.
  • If your goal is the extra ending, treat the `Black Box Mod` as the capstone reward, not just another item in the pile.

// Best Route

Safest Reward Route

1. Clear Alpha Early

The first Hidden Chamber clear is the safest early target because it is the cleanest documented route to `Shelter License Key Level 5`.

2. Alternate Bosses and 100%

Rotate between Enhanced bosses and sector completion so you keep unlocking pods instead of grinding one side of the system too hard.

3. Treat the Vault as Phase Two

`Lim Cannon`, `Black Box`, and the outfits are your final reward layer, so plan around the full 10-mission clear rather than expecting them piecemeal.

4. Finish with Black Box Equipped

If you care about story payoff, do not forget the final equip step. The `Black Box Mod` only matters when it is active for the final boss rematch.

Most common mix-up: players often bundle `Sim Pod completion`, `vault rewards`, and `true ending trigger` into one step. They are three linked steps: clear missions, open the vault, then equip `Black Box` and rematch the final boss.

// Internal Links

Continue With Related Guides

Post-Game

Best broad hub if you want the cleanup route around these rewards, not just the prize list.

Training Simulations

Useful if you want the clean split between Shelter sims and Hidden Chamber Secret Missions.

Black Box Mod

Best follow-up if you want the exact unlock route, equip step, and ending trigger for the mod alone.

Endings

Best follow-up if your real goal is the Black Box route and the extra ending scene.

Trophies

Helpful if reward hunting is tied to the full completion roadmap and The Right Man for the Job.

All Collectibles

You will need this if your remaining Secret Missions are still blocked by sector 100% requirements.

// FAQ

Unknown Signal Rewards FAQ

What are the main final rewards from Unknown Signal?

The highest-confidence final reward list is `Lim Cannon`, `Black Box Mod`, and `Obsidia` outfits for Hugh and Diana, all collected from the Architect's vault.

Which Secret Mission gives the level 5 Shelter key?

Current reward coverage ties `Shelter License Key Level 5` to the first Hidden Chamber mission clear, often labeled `Secret Mission Alpha` in launch-week guides.

What is the `Black Box Mod` actually for?

`Black Box Mod` is the narrative-critical reward used to trigger the extra ending route. Equip it before the final boss rematch in Central Port if you want the post-game story payoff.

Do I need all 10 missions for the final reward chest?

Yes. Current post-game guides agree the Architect's vault opens only after all 10 Secret Missions are complete.