A simple oneliner that perfectly catches the obfuscated coding spirit.
Yup, the classic mandelbrot fractal, about as obfuscated as it can get. Get yourself some coffee before you run this one!
If BASIC isn't obfuscated enough for you, try BrainFuck! Of course, things would not be the same without an obfuscated interpreter coded in MSX-BASIC...
Yes indeed, a 2-player Bomberman game coded in BASIC!
A neat R800 CPU mode switcher in genuine obfuscated BASIC. Interested in how it works? Visit the forums... 
Rally X - Final version . A comlete racing game written in only a few lines of (obfuscated) MSX-BASIC. Includes ranking & gear shifting.