Create classroom
Share your private brief. Cross-check the evidence. Complete the mission together.
Player guide
How to play CrossBrief
A cooperative classroom game with 18 adult English missions. Each participant holds different private evidence, so the team must discuss it aloud before making shared, server-verified decisions.
Cooperative · Educational · Online multiplayer
Brief separately. Decide together.
A cooperative classroom game with 18 adult English missions. Each participant holds different private evidence, so the team must discuss it aloud before making shared, server-verified decisions.
At a glance
- Free browser game
- No download required
- No account required
- Touch ready
- 2–4 participants + teacher
- 18 authored missions
- No account or internal chat
How to play
Quick start
- 01
Join a teacher-led room from your own device.
- 02
Explain private documents without revealing your screen.
- 03
Propose structured actions and confirm them as a team.
At a glance
Ways to play
Touch ready
Controls
- Discuss the evidence with your team before choosing an action.
- Private documentsPrivate information — do not share this screen
- Propose action
- ActionsSelect the best supported option.
- Confirm proposal
- Waiting for team confirmationThis role does not have authority for the current action.
CrossBrief
Rules that matter
- 01
I understand that my screen contains private information.
- 02
Visible to the whole team. The game does not evaluate these notes.
- 03
Discuss the evidence with your team before choosing an action.
CrossBrief
Good to know
- 18 authored missions
- Public presentation — safe to share
- Facilitator console — private
Player guide
Questions
How do I win?
Share the evidence only you can see and reach a correct team conclusion before time runs out.
Which modes can I play?
Create classroom: Share your private brief. Cross-check the evidence. Complete the mission together.
Do I need to download or install anything?
No. The game runs directly in a current browser. Installing the RNE Games app is optional.
Do I need an account?
No. You can start without an account. Online features use an anonymous identity stored on your device.
Can I play on a phone or tablet?
Yes. The interface adapts to smaller screens and provides touch controls when the game needs them.
Ready when you are