Operation Wolf

Being a one-man army is a difficult business - just ask that bloke Rambo. But you have taken on the hard task of mowing down whole platoons of enemy forces single handed, all to rescue hostages from a rather nasty concentration camp. Choosing from one of four stages, you have a first person view of the action and have to carefully aim your on-screen crosshair to take out the bad guys - but don't get too trigger happy, as there are many civilians and innocents who have chosen just this moment to go for a stroll in the middle of a raging firefight. You have limited ammunition, which can be replenished by shooting the spare clips lying around (which are also dropped from objects such as coconuts and birds), and also a small supply of extra powerful rockets which make short work of armoured vehicles or helicopters that have you in their sights. Occasionally you will see a pile of dynamite that serves as a smart bomb, and a nice energy drink which increases your health slightly - which is essential as it does not recover between levels.

(from The PC Engine Software Bible)

Generally, you can review the controls (keyboard) setting during each game in the screen before it starts. Use the arrow keys and “Z”, “X”, “A”, “S”, “Q”, “E” buttons to play, or customize yourself with your gamepad or keyboard.