£3.48 for the complete collection from gamingworld via kinguin, £4.18 if you want to add the kinguin "buyer protection"
£19.99 on steam store.steampowered.com/app…st/
You can try out chapter 1 for free on steam.
King’s Quest is a collection of five different chapter releases, each focusing on an untold tale in Graham’s past. Discover a wondrous world full of whimsical characters, charming puzzles and perilous dangers in this fun and enchanting coming of age story