40		Twins in Trouble (DOS, 1994)
40		Up Side Town (DOS, 1993)
40		Klockwerk: The Shadow in the Cathedral (Windows, 2009)
40		Freddi Fish 3: The Case of the Stolen Conch Shell (Windows, 1998)
40		Woodspell (Windows, 1996)

Notes: Games similar to Giant Killer, Games like Giant Killer, Topologika Software Ltd., DOS, Adventure, Educational, Fantasy, Math, Logic, Interactive Fiction, Text Adventure, Puzzle elements, Turn-based, Text-based, Spreadsheet, PC, Game Similarities.