# FriendFinder AFF > Solve circuits, catch storms and rebuild an electric fortress — fully offline. Canonical page: [https://chrome-stats.com/d/thunderkeep.thunderkeep756](https://chrome-stats.com/d/thunderkeep.thunderkeep756) ## Overview - **ID:** `thunderkeep.thunderkeep756` - **Platform:** Android - **Type:** Android app - **Status:** Removed - **Publisher:** LASMONT s. r. o. - **Category:** GAME\_PUZZLE - **Downloads:** 19 - **Version:** 1.1 - **Last updated:** 2026-09-10 - **First published:** 2026-08-28 - **Publisher country:** SK - **Size:** 11 MB - **Data as of:** 2026-09-22 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=thunderkeep.thunderkeep756) - **Privacy policy:** [https://sites.google.com/view/privacy-policy-thunderkeep/privacy-policy](https://sites.google.com/view/privacy-policy-thunderkeep/privacy-policy) ## Description Thunderkeep is an offline puzzle game set inside a ruined electric fortress. You
play as its Keeper: the storm core has gone dark, the conduits are broken and
twelve sectors sit sealed behind failed power routes. Every puzzle you solve
sends real energy back into the keep, and every unit of energy you earn goes
straight into rebuilding it. There is no account, no timer pressuring you and no
connection required — the entire fortress lives on your device.

Three challenge chambers sit at the heart of the keep, and each asks something
different of you. The Circuit Chamber is a rotation puzzle: tap conduit nodes to
turn them until current flows from the source to the terminal with no loose ends
left leaking at the edges, all inside a strict move limit. The Lightning Tunnel
is pure reaction: fifteen storm signals race outward from the tunnel core, each
one faster than the last, and you must strike the matching seal in the narrow
window before your three shields collapse. The Magnetic Core is spatial: set the
field to attract or repel, fire one of two coils, and the sphere slides until a
wall or a sealed block catches it — guide it into the capture core, sweeping up
energy shards on the way.

KEY FEATURES
✓ Circuit Chamber — three hand-built rotation puzzles where one loose connection
destabilises the whole route, scored on efficiency, not just completion
✓ Lightning Tunnel — a fifteen-signal reaction run with perfect/stable/miss
timing bands, combo scoring and three shields between you and a lost run
✓ Magnetic Core — three sliding-field levels with a strict pulse budget,
collectable shards and a solver-backed hint when a route stops making sense
✓ Restoration Lab — spend earned energy across a twelve-sector blueprint where
each chamber unlocks only once its prerequisites are already online
✓ Voltage Vault — ten relics with their own origins, power and stability
ratings; stabilise one and link its signature to your Control Deck
✓ Daily Expedition — a three-stage route across all three chambers that resets
each day and extends your Keeper streak
✓ Keeper Records — a skill radar across logic, reflex, control, archive and keep
progress, plus a run-by-run archive of every chamber you have cleared
✓ Fifteen achievement seals, including hidden ones, each paying an energy reward
you can reinvest in the fortress

HOW IT WORKS
1. Pick a chamber from the Control Deck and clear its puzzle to earn energy.
2. Take that energy to the Restoration Lab and bring a sealed sector online.
3. A restored sector opens the next branch of the blueprint — and the deeper
sectors need both wings of the fortress running before they will wake.
4. Complete the Daily Expedition to keep your streak alive and release the
reward vault.
5. Climb the Keeper ranks, from Spark Initiate to Thunder Sovereign.

WHY THUNDERKEEP
Most puzzle collections are a menu of unrelated minigames. Here the three
chambers feed one structure: the energy you win in a reaction run is the same
energy that opens a sealed archive on the far side of the map, and the fortress
visibly changes as you go. The whole game is built around a single evolving
place rather than a scoreboard. It runs entirely offline, holds your progress
locally, and never asks you to make an account or watch an advert.

PRIVACY
Thunderkeep works fully offline. Progress is stored only on your device. There
is no account, no tracking, no advertising and no network connection required to
play any part of the game.

Wake the storm core, reconnect the grid and bring Thunderkeep back online. ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_CUSTOM_AUDIENCE` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.huawei.appmarket.service.commondata.permission.GET_COMMON_DATA` - `com.samsung.android.mapsagent.permission.READ_APP_INFO` - `thunderkeep.thunderkeep756.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [Thunder Splash](https://chrome-stats.com/d/com.oekever.argows) — 188 users - [567FFuse](https://chrome-stats.com/d/com.bnyxbritefuse.qwertyulogic) — 26 users - [Storm Keeper](https://chrome-stats.com/d/com.fhgh.a_storm_keeper) - [Otherworld: Circuit Puzzles](https://chrome-stats.com/d/com.generationxdesign.otherworldcircuits.v1) — 76 users - [Power Connect : Puzzle](https://chrome-stats.com/d/com.OMCDev.Hexablock) — 82 users - [Gridlocked - Puzzle Game](https://chrome-stats.com/d/com.leonegaming.gridlocked) — 560 users, 5.00 / 5 - [BoltCode](https://chrome-stats.com/d/com.boltive.boltcode) — 15 users - [Circuit Puzzle](https://chrome-stats.com/d/io.mbrlabs.circuit) — 33 users - [Fulgur: Pipe & Light Puzzle](https://chrome-stats.com/d/com.jasspym.fulgur) - [Circuit Hacker](https://chrome-stats.com/d/com.novalayer.circuithacker) — 11 users - [Electrify! Circuit Puzzles](https://chrome-stats.com/d/com.CalandriaGames.Electrify) — 6,090 users, 4.09 / 5 - [Light Charge: Energy Connect](https://chrome-stats.com/d/com.ezg018.battery.light.connect.match.puzzle) — 2,961 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/thunderkeep.thunderkeep756)