Voodoo Nightmare is an isometric action game with puzzle elements. The game world consists of a jungle and five temples which have to be cleared. To do so, Boots need to travel inside the temples, collect all diamonds and offer them to the temple god. In return he receives a magic ability for this voodoo doll which allows him to proceed somewhere else in the jungle. Some of those diamonds are hidden and need to be found by killing the correct enemy or by performing actions, e.g. jumping puzzles or sliding blocks correctly. Fruit and additional jewels act as currency and can be reinvested inside the jungle shops which have useful items in stock, e.g. weapons, dynamite or maps. If Boots feels lucky, he can also visit casinos.
MECC released a DOS version of The Oregon Trail that was essentially identical to the Apple II version. However, the graphics had to be redrawn for the DOS version, using a different color palette and a slightly different resolution – and therefore screen shots of the DOS version are slightly different than the corresponding Apple II screen shots.
An "enhanced" version of the first game in the King's Quest series released several years later which utilized the SCI (Sierra's Creative Interpreter) graphics engine. It also included other improvements such as sound card support (with a corresponding in-game soundtrack) as well as an expanded story which alters some aspects of the original gameplay as a result. This version was included in several King's Quest Collections over the years, often alongside the original version of the game.
A port of Wonder Boy III: The Dragon's Trap developed by Hudson Soft for the PC-Engine. It was released in Japan under the title of Adventure Island, shouldn't be confused with the Adventure Island series, also by Hudson Soft.