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🎮 How to Play
- Choose Classic (3) or Extended (5) mode.
- Choose Best of 3, Best of 5, or Best of 7 rounds.
- Click Stone, Paper, or Scissors — or in Extended mode also Lizard and Spock.
- The computer picks instantly. The result shows at the top — win, lose, or draw.
- First to win the majority of rounds takes the game.
📜 The Rules
Classic Mode (3 choices)
- Stone beats Scissors
- Scissors beats Paper
- Paper beats Stone
- Same choice = Draw — no points awarded
Extended Mode (5 choices)
The extended version adds Lizard and Spock to the classic three. Every choice beats exactly two others and is beaten by exactly two others — keeping the game perfectly balanced.
- Stone crushes Scissors and crushes Lizard
- Paper covers Stone and disproves Spock
- Scissors cut Paper and decapitate Lizard
- Lizard eats Paper and poisons Spock
- Spock smashes Scissors and vaporizes Stone
- Same choice = Draw — no points awarded
📊 Classic vs Extended
| Feature | Classic (3) | Extended (5) |
|---|---|---|
| Choices per round | 3 | 5 |
| Chance of a draw | 1 in 3 (33%) | 1 in 5 (20%) |
| Winning combos | 3 | 10 |
| Best for | Quick decisions | Longer, more varied games |
🎯 Is the computer's pick truly random?
Yes. Every computer pick is made using your browser's crypto.getRandomValues() function — the same cryptographically secure random generator used by password managers and banking apps. The computer does not "read" your choice, does not favor any option, and does not adjust its strategy based on your past moves.
If you feel the computer is winning too often, that's just how randomness works over a small sample size. Play 100 games and you'll see the results balance out.
💡 Fun Facts About Rock Paper Scissors
- The game originated in China during the Han Dynasty (206 BC – 220 AD).
- The earliest known reference to the modern three-hand version comes from 19th-century Japan.
- There are World Championships held in Toronto every year since 2002.
- In a random game, all three choices are equally likely — 33.3% each.
- Studies show people tend to favor "rock" on the first throw. Smart players open with paper.
❓ Frequently Asked Questions
Yes. The computer uses
crypto.getRandomValues() — the same secure random generator used by password managers and banking apps. It never adjusts based on your previous choices.Yes. Choose your mode at the top. Best of 3 means first to 2 wins. Best of 5 means first to 3. Best of 7 means first to 4. Changing the mode resets the current score.
Your current score is saved in your browser's localStorage — never sent to any server. Clearing your browser data or clicking "Reset Game" clears it.
Yes. Once the page loads, the game runs entirely in your browser. If you lose internet connection mid-game, nothing breaks.
It doesn't — you're noticing the losses more than the wins. This is called "negativity bias" and it's a normal human trait. Play 100 rounds and count the totals — you'll be within a few games of 33% wins, 33% losses, 33% draws.
Classic mode has 3 choices — Stone, Paper, Scissors. Extended mode adds Lizard and Spock for 5 total choices. The extended version is from The Big Bang Theory and reduces draws from 33% to 20%, making games more varied.
Against a truly random computer, there's no strategy — every choice has equal odds. Against a human, look for patterns. Most people throw rock first. Opening with paper gives a slight edge over another human. But against this computer, strategy doesn't help.