Chip's Challenge is a top-down tile-based puzzle video game originally published in 1989 by Epyx as a launch title for the Atari Lynx.

The premise of the game is that high-school nerd Chip McCallahan has met Melinda the Mental Marvel in the school science laboratory and must navigate through Melinda's "Clubhouse", a series of increasingly difficult puzzles, in order to prove himself and gain membership to the very exclusive Bit Busters Club.

In 1989, Sommerville led a team of programmers at Epyx to write Chip's Challenge for Atari Lynx during a ten-week period shortly before the system's launch.

[2] Chip's Challenge was ported to several other systems, including the Atari ST, Amiga, Commodore 64, ZX Spectrum,[4] MS-DOS, and Windows.

Most of the conversions from the Atari Lynx original to other formats were carried out by Images Software in the UK, except for the Microsoft Windows version.

[5] Entering "TONY" as a password will bring the player to a level that credits the "WEP 4 test team" in the hint for that level and also contains different tiles that spell out developer names, including Doug T., Rob D., Ed H., and Lisa F.[6] According to Doug, a former roommate of Krueger's and one of the testers for the game, it was written in a single summer.

This version had significantly different sound and graphics, but became very popular due to the success of the Microsoft Entertainment Pack.

The iconic graphics are colorful but little more than functional, and the musical accompaniment is inoffensive if endlessly repetitive – but in this game, frills don't count."

[1] Chuck's Challenge 3D (2014) was funded through Kickstarter,[1] and released for Windows, Mac, and Linux on Steam,[14] and for Android on Google Play.