Loading…
A mysterious box is locked with a 4 to 8-digit code.Your only goal is to open it—with your own hands. No hints. No puzzles.But who needs them? If you try every number up to 9999... eventually, it will open.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest starts Jul 20, 2026
It's simple:
A mysterious box is locked with a 4 to 8-digit code.
Your only goal is to open it—with your own hands.
No hints. No puzzles.
But who needs them? If you try every number up to 9999...
eventually, it will open.
This is a game about perseverance, pattern, and reward.
Can you crack the code?
You are free to stream, record, and monetize content featuring this game—whether it's Let's Plays, walkthroughs, reviews, or anything else.
There are no restrictions on monetization methods, including ads, super chats, or other forms of support.
If you'd like to request explicit permission for any reason, feel free to contact us via X (formerly Twitter) or email.
Click the ▲ and ▼ buttons to change digits.
Use arrow keys (←/→ to move, ↑/↓ to change digits).
Press Space or Enter, or click the treasure chest to submit your guess.
If the input matches the code, the chest opens.
Game cleared—and you earn generous rewards!
Though there are no hints, coins and gems will occasionally fall during gameplay.
These can be spent on optional skills to boost your efficiency just a little.
Skills are purchased via the title screen
They remain active until manually disabled
Using them is optional—you can still clear the game without them!
Choose between 4 to 8-digit code lengths
Each digit length has its own save slot
You can freely switch between difficulties
Only one save file per digit length is allowed
The longer the code, the greater the reward.
Clearing without using any skills also boosts your final reward.
In Serious Mode, all skills are disabled.
But in return, the rewards skyrocket.
This mode is designed for players who want maximum challenge and maximum payout.
Clearing this mode also counts as completing Normal Mode for Steam achievements.
A short, basic tutorial is included.
Features a 3-digit version of the game
Perfect for learning controls and game flow
Takes just a few minutes to complete
Lowest tracked price: CA$3.49 (Jul 7, 2026) · current best: CA$4.99.
83% positive reviews all-time.
Right now the cheapest offer for 全部試せば開く！ is CA$4.99 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for 全部試せば開く！ is CA$3.49 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Create a free price alert on this page and KingsPrice will email you when 全部試せば開く！ drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
