Herculean Effort Productions (often abbreviated to HEP) is an adventure game development duo in the USA, founded by brothers Ian and Greg Schlaepfer. Of the two, Ian Schlaepfer is primarily responsible for the graphics and storyline and Greg for music and AGS scripting. Their games are considered to be of very high quality for amateur efforts, and their releases Apprentice and Apprentice II: The Knight's Move have won numerous amateur adventure game awards.