What is Who Done It?
Who Done It hands everyone an index card and a pen: write down one interesting fact about yourself, the kind nobody in the room already knows. Collect the cards, shuffle them, and pass them back out — each person reads a card aloud and has to guess who wrote it.
It works because a right guess takes real knowledge of the person underneath the fact, not just what's printed on the card. The best rounds are the ones where the guess misses — the reveal ends up doing more explaining than the fact itself ever could.
It leans on people already knowing something about each other, so a room of total strangers turns the guessing into a coin flip instead of a deduction. Save it for a team, a class, or any group that's already had at least one round of introductions.
The rules
- Give every participant an index card and a pen.
- Each person writes down one interesting fact about themselves — something most of the room wouldn't already know.
- Collect every card, then shuffle the pile.
- Pass the cards back out. Each person (or team) reads their card aloud, then guesses who wrote it.
- The guessed person answers yes or no, and can explain the fact if the guess is right.
- Play continues until every card's been read and guessed; reveal any authors still unmatched at the end.
Before you start
- Group size: 8–16 participants. For a bigger room, pick ten volunteers and split them into two teams of five instead of playing individually.
- Materials: index cards and pens. One card and one pen per participant is the whole list — set them out before anyone arrives.
- Indoors, seated where everyone can see and hear. A circle or a U-shape works — every fact gets read aloud, so sightlines and acoustics both matter.
- Decide individual or team play upfront. Announce it before pens come out so everyone knows whether they're covering for themselves or for a partner.
How to run it
- Pass out cards and pens 1 min
Give every participant an index card and a pen.
- Write the fact 2–3 min
Each person writes down one interesting fact about themselves — something most of the room wouldn't already know. The sillier or more unbelievable, the better.
- Collect and shuffle 1–2 min
Gather every card once everyone's finished writing, then shuffle the pile before you pass it back out.
- Read, then guess 1 min each
Each person (or team) reads their card aloud and guesses who wrote it. The guessed person answers yes or no, and can explain the fact if the guess lands.
- Reveal what's left 1–2 min
Once every card's been read and guessed, reveal any authors still unmatched.
← the reveal only works if you know the room.
Facilitator tips
Why it works
Reflection questions
For classrooms, trainings, and teams that want the debrief — these turn a guessing game into a real conversation about how well the room already knows itself.
- What was the most surprising fact you read during the game?Surfaces which cards actually landed — and gets people repeating the best ones.
- Did anyone guess a fact about you correctly? If so, which one?Puts the spotlight back on self-reflection instead of just the guessing.
- Was there any fact that made you want to know more about the person who wrote it?Names the follow-up conversations worth having after the game ends.
- How did it feel to share a personal fact about yourself?A quick read on how comfortable self-disclosure felt in this room.
- What was your favorite part of playing this icebreaker game?Ends the debrief on gratitude instead of critique.
- Is there anything you would change about the game if we were to play it again in the future?Turns feedback into notes for the next time you run it.