Fredrik Johansson, better known by the pseudonym MaDFroG, is a retired Swedish Warcraft III and StarCraft II player.

[1] His talent as a competitive real-time strategy gamer was noticeable at an early age, he finished third in the StarCraft: Brood War Nations tournament at the first World Cyber Games in 2001 representing Sweden.

[2] The environment in Seoul, South Korea, known unofficially as the "mecca" of professional gaming, suited him well and he improved as a player.

During the first part of his stay he had some success in Korean competitions, finishing third in the Kbk Jeju Tournament, but he did not feel satisfied with what he had achieved.

He would once again represent his country at the Electronic Sports World Cup (ESWC) and finished second again, losing to Dae Hui Cho in the finals.

In 2010, after StarCraft II: Wings of Liberty was released, Johansson frequently played on the European ladders and participated in a number of tournaments, including the Inferno Cup and played a show match against professional StarCraft II player, Dario "TLO" Wünsch from TeamLiquid, at the 2010 European Warcraft 3 Invitational.

Not long afterwards, Johansson was invited to the Intel Extreme Masters Global Challenge 2010 (IEM) in Cologne, Germany putting him in direct competition with other professional players outside of Asia.