Wonderboy 2: Wonder Boy in Monster Land
© 1987 Sega/Westone
This is a pretty sweet unknown Sega game that most people probably recognize in its bootlegged form. Main differences from the bootleg is in the final stage, time is NOT renewed on each screen, making it much more tense and difficult.
Highest score I've ever managed, and a heart pounding ending. This is why you NEVER give up until that you see that game over screen.