
铁门之下
A grounded post-apocalyptic interactive narrative. Fortify the Black Box shelter, manage supplies, trust, and evidence, and decide who survives on either side of the iron gate.
Offers
What are keyshops?Official stores
Official stores with direct support.
About 铁门之下
Before you close the Iron Gate, decide who gets to stand inside it
Beneath the Iron Gate is a grounded post-apocalyptic interactive cinematic narrative. You play as Lu Chen, a former security systems engineer who turns an old cold-chain warehouse into the Black Box, a shelter built before the city goes silent and public order collapses.

The shelter is not the end. It is where the choices begin
Every supply run, every opened door, and every broadcast can redirect the route ahead. You will weigh food, medicine, fuel, water, reputation, and trust. A decision that looks correct tonight may become the cost you pay during the siege.

Evidence can hit harder than a weapon, if you survive long enough to use it
The Ark Society controls vaccine batches, registry systems, and broadcast channels. You will gather sample IDs, ledgers, access records, and witness testimony, then decide when to turn silence into proof. Revealing the truth can save people, but it can also bring the enemy to your gate.

Not every ally learns to trust you the same way
An emergency doctor, a supply-chain manager, a retired tactical officer, a radio host, a lab assistant, and the shelter's ordinary survivors all carry their own limits and fears. Trust is not just a reward meter. It is whether someone still stands beside you when the gate alarm starts.

Branches, bonds, and endings
The story follows resource, medical, broadcast, truth, siege, and relationship routes. Your choices affect supplies, character trust, public reputation, ruthlessness, and the final route. You can turn the Black Box into a cold fortress, or into a community still willing to open the door.

Features
Grounded post-apocalyptic interactive storytelling with still-frame presentation, subtitles, voice, and soft cinematic transitions.
Choice-driven route structure where resources, trust, evidence, and public reputation keep shaping later scenes.
Character bond routes built around alliance, boundaries, affection, and responsibility.
Multiple ending directions, including fortress survival, medical commonwealth, radio fireseed, and hidden truth routes.
A focused single-player experience about judgment, tradeoffs, and consequences rather than grind.
Game details
Game details
Age ratings
Game modes
Languages
Features
铁门之下 price history
Lowest tracked price: €2.52 (Jul 23, 2026) · current best: €2.52.
铁门之下 — frequently asked questions
Where can I buy 铁门之下 at the cheapest price?
Right now the cheapest offer for 铁门之下 is €2.52 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
What is the lowest price 铁门之下 has ever been?
The lowest price KingsPrice has tracked for 铁门之下 is €2.52 (recorded on Jul 23, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
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System requirements
Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64 位
- Processor: Intel Core i3-6100 / AMD FX-8350 或同等性能
- Memory: 4 GB RAM
- Graphics: DirectX 12 兼容显卡,2 GB VRAM;NVIDIA GeForce GTX 750 Ti / AMD Radeon R7 260X 或同等性能
- DirectX: Version 12
- Storage: 6 GB available space
- Sound Card: Windows 兼容声卡
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10/11 64 位
- Processor: Intel Core i5-8400 / AMD Ryzen 5 2600 或同等性能
- Memory: 8 GB RAM
- Graphics: DirectX 12 兼容显卡,4 GB VRAM;NVIDIA GeForce GTX 1050 Ti / AMD Radeon RX 560 或同等性能
- DirectX: Version 12
- Storage: 6 GB available space
- Sound Card: Windows 兼容声卡











