The Pendragon series was created and designed by brothers Dave and Bob Thomas, with Ultimate founders Tim and Chris Stamper otherwise being uninvolved in development.

Other scattered items in the game include keys for locked doors, gunpowder to fire cannons and pieces of jewellery, the latter having no additional use other than adding to the player's score.

[4] Dave Thomas began his career in 1983 when he started producing multiple games for the Atari 400, including moderate-sellers such as Warlok, which later won him £5,000 in a competition from Calisto Software.

The Thomas brothers decided to show their progress of the game to Tim and Chris Stamper for evaluation, despite feeling embarrassed due to their workspace being inside their parents' attic.

A reviewer of CVG thought the graphics were identical to its predecessor, Entombed, and criticised the low detail of the player-character, Sir Arthur Pendragon.

[1] Eugene Lacey of Commodore User praised the graphics, stating that they were smoother and slightly more detailed, despite acknowledging that they appeared similar to its predecessor.

[2] Stuart Cooke of Your Commodore thought the graphics were too "repetitive" and stated that he had trouble determining which section of the game he was on due to the similarities of all the colours.

[3] Tony Hetherington of Computer Gamer similarly criticised the graphics, owing to the "duplicated landscapes" and identical usage of colours, concluding that it was a disappointing game.

[3] Hetherington concluded that Blackwyche was a disappointment for an Ultimate game, considering previous titles such as Atic Atac and Knight Lore.