Privacy

Undergroundoku is meant to be fun and lightweight. There is no account and no login.

• Your puzzle progress is stored only in your browser's localStorage so you can pick up where you left off.
• A random anonymous id is kept in your browser to recognise repeat visits. It is not linked to any personal information.
• We count aggregate, anonymous numbers — how many people played and the spread of scores for a day — so we can show you where your score ranks. We never store who played what.

Clear your browser storage at any time to reset everything. Questions? Reach out to the maker of London Metro Memory.