Tir Na Nog is a 1984 video game by Gargoyle Games for the ZX Spectrum and Amstrad CPC. It was ported to the Commodore 64 in 1985. It is based on Celtic mythology.
The game was widely positively received by the gaming media. The game forms part of an unofficial trilogy with the science fiction title Marsport and Dun Darach. Dun Darach review published here.
The game got groundbreaking features for that 1984 year such as a large central character, animated backgrounds and parallax scrolling.
Psygnosis Software planned to release a PC remake of the game in June 1995. However the project was canceled.
Tir Na Nog is set in a mythical Celtic world peopled by the Sidhe. Once mighty, now fallen on hard times, these monkey-like creatures are the main protagonists in the adventure. They had bound the Great Enemy by creating the Seal of Calum, and thus had become a great civilisation. But the Great Enemy had managed to steal the Seal by sending a thief. In their rage the Sidhe killed the thief but the Seal was shattered into four pieces and the Great Enemy freed to wreak havoc on the Earth again. So fell the Sidhe into sub-human beasts.
When the game opens, it is a new, darker age. You play Cuchulainn, the Hound of Heaven, a mighty warrior who has been called to reunite the four pieces of the Seal of Calum and thus defeat the Great Enemy. In this respect Tir Na Nog is definitely an adventure. You are required to explore, seek useful objects such as weapons and keys (some of whose uses are immediately apparent, and some are not), and interact with the other characters who inhabit the land. But it is not a text orientated adventure — text only plays a part in telling you where you are and what objects you are carrying, although occasionally there are situations where text will appear, such as the Oracle. There are puzzles to solve (the Oracle’s obscure pronouncements are such), and there are many arcade situations where quick reactions are needed to stay alive.