Heart of Darkness is a side-scrolling adventure with a dark streak and a focus on platforming. Its brand of gameplay isnít completely new Ė the style is reminiscent to that of Another World / Out of This World. You enter a new location, die, complete a few screens, die, figure out the puzzle, die, go through the same screens again, die, ad infinitum. The game only saves at certain locations, so replaying the same few screens 20-30 times isnít out of the question.
The graphics look a few years behind the times as far as resolution and color depth, going in at merely 256 colors. But the graphics are well drawn, with plenty of clever animation to give life to the bizarre world portrayed within. But the game is repetitive nonetheless, although even with all its dying and restarting an average player can complete Heart of Darkness in about six to seven hours. So not a whole lot.