AI-PoweredPlaytest pending
Lakera Agent Breaker
Prompt-attack challenges against simulated AI applications
Actual browser capture · Oct 15, 2026 · Official source
Play on play.lakera.ai Opens the developer’s site in a new tab.
About Lakera Agent Breaker
The former Gandalf entry now redirects to Lakera Agent Breaker. Its challenges ask players to use prompts to test the defenses of simulated AI applications, with objectives and scores for each attempt.
What the AI does: Language-model applications respond to prompt attacks; each challenge scores whether its objective was achieved.
Before you play
This is the destination of the old Gandalf URL, not a verified copy of its password-level game. Challenge completion and access requirements still need testing.
A full playtest across supported devices is pending (see how we test).
What we checked
The former Gandalf URL redirected to Agent Breaker. Its challenge instructions loaded; no challenge was submitted.
- Access & cost
- The challenge instructions are public. Account and pricing requirements for completing challenges remain unconfirmed.
- Device evidence
- Desktop instructions checked. Mobile and Chromebook play remain untested.
