Working at Koei both in Northern California and Japan, he either created or was the lead designer for a number of games including Liberty or Death, Celtic Tales: Balor of the Evil Eye, Gemfire and Saiyuki: Journey West.

He was impressed by the potential of their latest game, Diablo, and immediately joined the team taking on the lead design role.

[8] Diablo II: LOD was released in 2001, and helped to “reinforce the staying power of an already legendary RPG”.

[10] On April 17, 2000, Hedlund announced that he would be leaving Blizzard North "as soon as his responsibilities for Diablo II (had) been fulfilled" in order to start a new game-development firm called Full-On Amusement Company[11] with business partners, programmers, and artists from Virgin Interactive, Sega, Sony Computer Entertainment, Electronic Arts, and Maxis.

During this time, Hedlund collaborated with director David Lynch on his unreleased Woodcutters from Fiery Ships game project.

[12] Later in 2000, Hedlund joined Konami as the company's Creative Director and worked on titles such as the iconic Frogger and Contra series.

Beginning in August 2004, Hedlund signed on with Perpetual Entertainment as Design Director for Gods & Heroes: Rome Rising,[14] officially announced in March 2005.

After leaving Perpetual, Hedlund founded Turpitude[19][20] an independent game development firm, along with partner Natalie Fay.