The following comparison screenshots display the differences between the original and the redux versions of King's Quest.
The title screen has been massively overhauled which now harkens back to the style of the intro screens of King's Quest III and IV before displaying the game credits.
It always seemed odd that in Daventry, a land of mostly deciduous and pine trees, that there would be a palm tree nestled up against the castle. This has been rectified by replacing the offending palm tree with more flowers.
The addition of the Achaka memorial statue is a reference to The Odd Gentlemen's 2015 King's Quest game.
The witch Dahlia has been doing some redecorating in her house with a change of color here and there. Plus she found a magic bowl to be much more useful than a cryptic note.
Speaking of that cryptic note, it has swapped locations with the bowl as one of several modifications in this game.
The biggest changes in this room is the appearance of the scepter and shield, which now more closely match the the inventory close ups.
The lone conifer in this scene looked sickly and out of place, so it was removed. The appearance of the trees vastly improved in King's Quest II, and met its pinnacle of artistry in the AGI version of King's Quest IV.
One of the most noticeable changes in King's Quest 1 Redux is the addition of a new area, which can be reached via the entrance at the stairs landing inside the mountain.
There are a number of cases in the original game where an inventory item's close up image does not properly correspond to what it looked like in the game scene. The initial version of King's Quest did not have these close up shots of the inventory items, so this was a disparity between the original and the later EGA updates. In this case, the mushroom has been changed from a bland, grey mushroom, to the more colorful one original seen. Also, a secondary mushroom will appear in the entrance of the leprechaun cave if Graham forgot to pick the one by the river, which helps reduce one of the dead end cases in this game.