Heart of Darkness is a cinematic platformer in the vein of Eric Chahi‘s previous game Another World in which players control Andy, who faces various dangers in search of his dog, Whisky. Players progress through the game’s linear storyline by navigating various environments and solving puzzles, all whilst attempting to keep Andy from being killed by evil shadows, hungry wildlife, and perilous obstacles. Along with basic movement, such as running, jumping, and climbing, certain sections of the game give Andy additional abilities. The plasma cannon allows Andy to shoot lightning at shadows in order to disintegrate them. The Special Powers, which can also be used offensively against enemies, can additionally be used to grow and destroy trees born from seeds. The player has unlimited tries, with Andy returning to the most recent checkpoint when he is killed.

https://www.youtube.com/watch?v=yIU4Qf2xxRk
Original CD/demo files needed.

http://netsurf.baderman.net/HeartofDarkness.lha