I can verify that Ultima 7 (Exult engine) works on the Pi.

I did think if an even cheaper method to activate a relay remotely (I've done this to turn on a remote pc as an FTP server in the past) Get an old Nokia 3210 - or any other old Nokia that let's you make custom ringtones along with its own pay as you go sim (free). Create a ringtone that consists of...