The Sacred Armour of Antiriad

The Sacred Armour of Antiriad is a 1986 platform/exploration game developed by Dan Malone and John Heap and published by Palace Software for the Commodore 64, ZX Spectrum, Amstrad CPC and Amiga. Set in a post-apocalyptic future where humanity has reverted to a stone-age existence under alien overlords, the player controls the warrior Tal as he searches for the eponymous powered exoskeleton that will let him take the fight to the enemy. The game shipped with a full-colour comic book by Mark Walker that introduced the storyline (Wikipedia)