Grimshaw the Collector of Coins extends his hand

Grimshaw the Collector of Coins

“Grimshaw likes to play games. Not the kind you win with skill — the kind that reveal who you really are.”

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What Is Grimshaw?

A Discord bot that hosts multiplayer game theory experiments. He is not a referee — he is the house.

Games of Trust

The Public Goods Game. Each round, players secretly choose how much to contribute to a shared pool. The pool is multiplied and split equally — regardless of who gave what.

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Real Consequences

A persistent economy of coins. Pay to play. Go bust, and you must beg the very people who exploited you for help. The social pressure IS the game.

The House Always Wins

Grimshaw takes his cut. Entry fees, rake percentages — the house controls the stakes. Transparency, not trust. You see the odds. You sit down anyway.

How It Works

1

Grimshaw opens a table

"Who dares sit down?"

A player runs /grimshaw play and chooses a game mode. The lobby is open.

2

Players sit down

"Your coins have been collected."

Players join and pay an entry fee. 3 to 8 players per table. Real coins. Real stakes.

3

Secrets are kept

"How much will you give?"

Each round, secretly choose how much to contribute. Only you see your choice. The tension is absolute.

4

The pool is counted

"Grimshaw's grin widens."

Contributions are revealed. The pool is multiplied and split equally. Free-riders profit. Cooperators question everything.

5

Grimshaw collects his due

"He always counts the coins."

The table closes. Payouts are credited. The rake is taken. And Grimshaw waits for the next game.

Game Modes

Three variations of the same question: can you trust the people at the table?

Core

The Pure Free-Rider Dilemma

Contribute to the pool or keep for yourself. The pool is multiplied and split equally. Contributing nothing is individually rational — but if everyone does it, everyone loses.

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Punishment

Justice Has a Price

After contributions are revealed, spend 3 coins to deal 9 damage to a free-rider. But punishment costs YOU too. Is justice worth the price?

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Threshold

Coordinate or Collapse

The pool only pays out if total contributions reach a threshold. Below it? All contributions are lost. You need everyone to give enough — but who gives first?

Commands

/grimshaw playOpen a table. Choose your mode, set the stakes, and wait for the brave.
/grimshaw joinSit down at an open table. Your entry fee is collected immediately.
/grimshaw walletCheck your coin balance and recent transactions.
/grimshaw gift @user amountAn act of generosity. Grimshaw is... curious.
/grimshaw statsYour history laid bare. Games played, coins earned, times punished.
/grimshaw leaderboardSee who sits atop Grimshaw's collection.
Grimshaw at his table

Grimshaw’s Voice

“Grimshaw has opened a table. Who dares sit down?”

When a game begins

“Grimshaw extends his hand. How much will you give?”

Contribution phase

“Grimshaw's grin widens.”

When a free-rider is caught

“Grimshaw looks at your empty pockets and grins wider. Perhaps someone will take pity on you.”

When a player goes bust

“A rare act of generosity. Grimshaw is... curious.”

When coins are gifted

“The table closes. Grimshaw counts the coins. He always counts the coins.”

Game over