I'm working on porting Nazghul to maemo4/N810. I haven't played through much of the included Haxima adventure, but it seems like it's playable so far.
I had to make some changes to allow the number keys to work on the N810 keyboard, and I also had to change the transparency of some of the graphics files. Music still doesn't work, but shouldn't be too hard to fix.
Download the tar file, untar to somewhere on your system, execute the program as root (haven't figured out the permissions to run as user yet...) Run with the following command: