Free · No sign-up · Runs in your browser
CalcSolver — The Calculator That Hides a Games List
CalcSolver is a free online calculator that works like any other — until you flip Code Mode and type 0000. A hidden list of games opens in the same tab. No download, no account, nothing to install.
- 130+
- games documented
- 0000
- the unlock code
- 15
- playable right here
Keyboard supported — click the calculator first, then type. Try Code Mode → 0000.
What is Code Mode?
Code Mode is a switch on the CalcSolver calculator that turns the number pad into a code entry box. Type a four-digit code and the display turns into dots — •••• — then something happens: 0000 opens the full games list, and every game inside has its own four-digit code that jumps straight into that game.
The calculator above has a working Code Mode of its own — flip the switch, type 0000, and a searchable list of 15 games opens: 3 built into this page, plus 12 licensed picks. The full 130-game list of the viral calculator, with every code, is in our Code Mode guide.
- 1
Flip the switch
Open the Code Mode toggle above the calculator's display. The display clears to 0.
- 2
Type 0000
Use the number pad or your keyboard. Each digit shows as a dot — you need all four zeros.
- 3
Games list opens
A grid of games appears over the calculator. Pick one and play — no download, ever.
Hidden Games — Most Wanted
The most-searched games in the CalcSolver code-mode list, with the code that opens each one. Full list: all 130 games.
Backrooms
1016First-person horror exploration · Single player
How to unlock →
2048
1004Sliding number puzzle · Single player
How to unlock →
Among Us
1010Social deduction party game · Single player vs. bots
How to unlock →
Basket Random
1022Ragdoll physics sports · 1–2 players
How to unlock →
Bloxorz
1028Rolling block puzzle · Single player
How to unlock →
Ballistic
1021Ricochet shooting puzzle · Single player
How to unlock →
Free Calculator Tools
Real calculators that run entirely in your browser — no sign-up, no limits, nothing sent to a server.
Tip Calculator
Tip amount, total, and per-person split — plus tipping norms for restaurants, salons and taxis.
Concrete Calculator
Slabs, footings, post holes and sonotubes in cubic yards, plus how many bags you need.
Time Card Calculator
Weekly and biweekly hours with lunch breaks, overtime, and military-time support.
Why Use CalcSolver?
Instant, no install
Loads as a plain web page and works on Chromebooks, school laptops and phones.
Nothing leaves your browser
Every calculation and every game runs locally. No account, no tracking of your math.
Real tools, not stubs
Tip, concrete and time-card calculators built for daily use, with the math explained.
A calculator with a secret
Code Mode hides a games list behind the keypad — the feature that made CalcSolver viral.