Harshbarger works as a puzzle designer for the Perplex City alternate reality game by Mind Candy.

As a puzzle designer, he used the pseudonyms Skrivnatin and Skrevnatin.

In recent years the definition of "burr" is expanding, as puzzle designers use this name for puzzles not necessarily of stick-based pieces.

Lloyd King (puzzle designer)

Lloyd King is a puzzle designer, published author, and artist, based in Australia.

Barry R. Clarke (born 14 March 1959) is a British puzzle designer.

Heaven & Earth page from Scott Kim (puzzle designer for the game)

Stewart Coffin's (one of the most important puzzle designers) books may be obtained, too.

Timothy Parker (puzzle designer)

The gels give the player more control over the environment, which increased the challenge for the puzzle designers.