Ghouls 'n Ghosts

Ghouls 'n Ghosts is a platform game developed by Capcom and released as an arcade game in 1988, and ported to a number of other platforms. It is the sequel to Ghosts 'n Goblins and the second game in the Ghosts 'n Goblins series.
A Sega Mega Drive/Genesis port of Ghouls 'n Ghosts was released in 1989 in Japan and North America and in 1990 in Europe.

Original description:

The time is yesteryear, when knights scoured the countryside in search of the Holy Grail, defended the honor of fair maidens and fought a never-ending battle against rampant evil forces. Thrown into this mayhem, is the courageous Sir Arthur. A victorious knight with the awesome task of penetrating the Demon's Castle to pulverize the Prince of Darkness. Can he do it? It's up to you. You'll dangerously travel through the Place of Execution, the Village of Decay, the Town of Fire, and the Crystal Forest with an arsenal of weapons at your side. And when you're really down on your luck, magic fights might with powerful results. The only problem? You'll have to learn how to use it. And avoid it. Because their magic has the power to change you into a helpless duck among other things. But there's not much time. Lives depend on you. So brandish your sword and make mincemeat of your foes.

Instructions

Enter - start;    Arrows - move;    X - attack;    C - jump;       Esc = exit fullscreen;

You can change keyboard settings, save (F5) and load (F8) the game.
Put your mouse over the game and choose your settings, you can also play the game in fullscreen.