On the former Tenchu Checkpoint we used to have 500+ missions made Tenchu players. Unfortunately most of these missions were lost during the hacker attack on the site. Peter S. has collected 300+ missions into an archive for you to download. They are for the UK version of Tenchu 2: Birth of the Stealth Assassins.
If you have some of the custom missions we used to host then please email them to me. Hopefully we will be able to get all of existing custom missions compiled into an archive. Country format doesn’t matter. UK, EU, US, JPN are equally welcome. If you send UK missions please check that they are not part of the archive yet. Missions can be emailed to restore (at) tenchu . de
Various questions about custom missions, for example how to play them, are answered in the F.A.Q