| The Famicom manual (cartridge code SQF-KG) calls the cartridge a Square game cassette and names the publisher as 株式会社電友社スクウェア (Den-Yu-Sha Co., Square), with an address in Ginza, Tokyo. It credits no developer or staff. | image 1, coverimage 2, opening noteimage 16, back coverimage 16, back cover | Manual |
| The Famicom manual calls King's Knight a vertically scrolling "formation role-playing game". Each of its four characters has his own way of attacking, and as an RPG they grow in jump, speed, attack power and defense. It has five stages, each with a warp zone (another world), 92 screens in all, and more than 50 kinds of characters; the four characters clear their own stages, then form a formation in the last stage to defeat the dragon. | p. 3 (image 5), 2. ゲームの特徴p. 3 (image 5)p. 3 (image 5)p. 3 (image 5)p. 3 (image 5)p. 3 (image 5)p. 3 (image 5)p. 3 (image 5) | Manual |
| The Famicom manual's stages: Stage 1, Ray Jack the knight, in the Forest of Magic; Stage 2, Kaliva the wizard, in a town ravaged by the dragon; Stage 3, Barusa the monster, in the night forest; Stage 4, Toby the thief, by the sea and sands. In Stage 5 the four act as one group in formation, and any who died in stages 1 to 4 are missing from it, so it may be fought by three, two or one. | p. 8 (image 10), 5. 遊び方, ゲームの構成p. 8 (image 10)p. 8 (image 10)p. 8 (image 10)p. 8 (image 10)p. 8 (image 10) | Manual |
| In the Famicom manual a character's Level runs from 1 to 20 and is the sum of four values: JUMP 0 to 7, SPEED 0 to 7, WEAPON (attack power) 0 to 3 and SHIELD (defense) 0 to 3. Its key to the Stage 5 screen says that when HITPOINT reaches 0, all of the heroes die. | image 13, status screenimage 13image 13image 13p. 7 (image 9), screen key, item ⑦ | Manual |
| The Famicom manual's hero's magic (勇者の魔法): collecting four each of the A, B, C and D parts lets the heroes use it in Stage 5, with the B button. The magic is four spells, ネイザス, バルバス, セチューン and ザイネン, each of which only a particular hero can use. (Naizath, Balbath, Cetune and Zainen are the NES booklet's spellings, nes-spells.) | p. 13 (image 15), 勇者の魔法p. 13 (image 15)p. 4 (image 6), B ボタンp. 13 (image 15)p. 13 (image 15) | Manual |
| The Famicom manual's continue mode, entered with SELECT on the title screen, lets the player choose any of stages 1 to 4 and any number of heroes to play; choosing none and pressing START starts at Stage 5. Each hero's latest data, his Level and the kinds and number of his parts, is kept until the power is turned off. | p. 10 (image 12), コンティニューモードの説明p. 10 (image 12)p. 10 (image 12)p. 10 (image 12)p. 10 (image 12) | Manual |