Name this old side-scroller

[manveruppd]

Was published by Sierra, you were this guy in a white space suit side-scrolling across this sci-fi/alien landscape, and hte intro music was Beethoven's Moonlight Sonata.

 

[lord filbuster]

Thexder. http://en.wikipedia.org/wiki/Thexder and http://www.geocities.com/thexderhome/thex.htm The sequal is by sierra apparently.

 

[manveruppd]

Thexder! That's the one!