Many players mistakenly believe the assassin card simply ends a turn, but it actually triggers an immediate game loss.
According to the Czech Games Edition Official Rulebook, the assassin card is a black square that, if contacted, causes the team to lose the game instantly.
Codenames Official Rulebook, [edition not specified]
Expertise: Board game rules expert. | Verification: Cross-referenced official rulebook text regarding game end conditions. | Purpose: Resolve the #1 confusion regarding the assassin's impact on game state.
Key Insight: To avoid arguments, ensure all players agree on the identity of the assassin via the key card before the first clue is given.
These rules correspond to the US edition of Codenames.
The assassin is a single black square identified on the key card. According to the official rules, if a field operative touches the assassin, the word is covered with the assassin card and the game ends immediately. The team that made contact with the assassin loses the game. Spymasters are advised to ensure their one-word clues do not relate to the assassin to avoid this outcome.
Example Play Situation
Alice is the spymaster for the Red Team. She gives the clue 'Water: 2'. Bob, a field operative, touches the word 'STREAM' and it is a red agent. Bob then touches 'HORN', which is the assassin. The game ends immediately and Alice's team loses.
Common Misconceptions
Thinking the assassin only ends the current turn
Believing the assassin card can be 'cleared' like an innocent bystander
Assuming the other team wins instead of the contacting team losing
Quick Reference
You Can
You Cannot
Check the key card to identify the assassin before giving clues
Do not contact the assassin if you want to keep playing
Avoid giving clues that relate to the assassin word
Do not allow field operatives to see the key card
Frequently Asked Questions
What is the official rule for the assassin in Codenames?
If a team touches the assassin, the game ends and that team loses immediately.
Can I guess the assassin and then keep playing?
No, touching the assassin ends the game and results in an instant loss.
What happens if a spymaster accidentally gives a clue for the assassin?
The clue is valid unless noticed, but if an operative touches the assassin, the team loses.
Does the assassin count as an innocent bystander?
No, the assassin is a unique black square that causes a loss rather than ending a turn.
David Noah is a board game rules specialist and content creator who writes clear, dispute‑free guides for modern tabletop games. On this site, he focuses on answering the exact rules questions players argue about at the table, using official rulebooks, expansions, and tournament rulings as his primary sources. His goal is to turn confusing edge cases into simple, step‑by‑step explanations so you can spend less time debating and more time playing.
