The fourth instalment of the series, Wipeout 3, was positively received upon release; critics lauded the graphics, fast-paced gameplay, and music,[93][94][95] although many reviews felt that the game's steep learning curve was a major fault.[95][96][97] Wipeout Fusion was more negatively received by critics; the graphics received mixed responses, with one reviewer saying that it looked like an "early first generation PS2 game",[98] despite another opining that the visuals had improved over all of its predecessors.[99] At the time of Wipeout Fusion's release in 2001, critics recognised the fact that techno music was an integral part of the series.[98][99][8]