It was developed by Swedish indie studio Wide Pixel Games, and published by Psytronik Software.

The player plays as a knight in a suit of armor who can walk left and right, jump, and swing their sword, which automatically emits a magical projectile blast with each blow.

The game received a 94% "Sizzler" rating from Retro Gamer, saying, "Knight ’N’ Grail is hugely enjoyable to play, with tight controls, well-designed and sometimes rather devious locations, and some intense bosses.

[3] Retroaction awarded the game 91%, noting its "truly stunning appearance" and "brilliantly moody soundtrack", concluding that "[q]uality is apparent in every aspect of Knight 'n' Grail".

[4] John Dennis of Retro Gamer CD called it a "fabulous game", saying it had him "glued to the screen from start to finish" and gave it a perfect 5/5 score.