We are talking about one of the best shooter of all times!
There're 3 games of this series:
POWER STRIKE 1 (SEGA MASTER SYSTEM)
POWER STRIKE 2 (SEGA MASTER SYSTEM)
POWER STRIKE 1 (SEGA GAME GEAR)
POWER STRIKE 2 (SEGA GAME GEAR)
it seems that the Game Gear version is the best but I never played it because I don't have a GG

And I don't like handheld emulation...