Deniska has posted a new version of his port of Tyrian to the PSP.

Changes:

Update: [01/04/08] OpenTyrian_PSP_09 patch released.
– music volume increased
– Christmas mode activation dialog added
– based on the latest (674) revision of OpenTyrian

Thanks to http://www.dcemu.co.uk for the news.

http://dcemu.co.uk/opentyrian-psp-v09-released-84994.html