Virtua Fighter 3tb, Pen Pen TriIcelon, Godzilla Generations, and July. In North America, it launched with 19 games, including the highly anticipated Sonic Adventure, Soulcalibur, and NFL 2K. In Europe, it was planned to launch with 10 games; this increased to 15 after the launch was delayed. Licensed Dreamcast games were released until mid-2002 in the US. Some indie developers continued to release games, such as 2007's Last Hope, developed by the German studio NG:Dev.Team. First-party games In what has been called "a brief moment of remarkable creativity", in 2000, Sega restructured its arcade and console development teams into nine semi-autonomous studios headed by their top designers. Studios included United Game Artists (UGA), Hitmaker, Smilebit, Overworks, WOW Entertainment, Amusement Vision, Sega Rosso, Wave Master, and Sonic Team, while Sega AM2 had been taken over earlier in the year by CSK Research Institute and became independent in 2001 as SEGA-AM2 Co., Ltd. Sega's design studios were encouraged to experiment and benefited from a relatively lax approval process. This resulted in games such as UGA's Rez, an attempt to simulate synaesthesia in the form of a rail shooter; Wow's The Typing of the Dead, a version of The House of the Dead 2 remade into a touch typing trainer; and Hitmaker's Segagaga, a Japan-exclusive role-playing game in which players are tasked with preventing Sega from going out of business. Sonic Team's Sonic Adventure, the first fully 3D platform game starring Sega's mascot Sonic the Hedgehog, was considered the "centerpiece" of the Dreamcast launch. At 2.5 million copies, it is the best-selling Dreamcast game. Sonic Team also developed the Dreamcast's first online game—ChuChu Rocket!—which was praised for its addictive puzzle gameplay and "frantic" multiplayer matches, and the critically successful music game Samba de Amigo, which was noted for its expensive maracas peripheral and colorful aesthetic. Sonic Team's Phantasy Star Online, the first online console RPG, is considered a landmark game for refining and simplifing Diablos style of gameplay to appeal to console audiences. UGA created the music game Space Channel 5 for a female casual audience; players help a female outer-space news reporter, Ulala, fight aliens with "groove energy" by dancing. Hitmaker's arcade ports include Crazy Taxi, an open-world arcade racing game known for its addictive gameplay with more than one million copies sold; and Virtua Tennis, which revitalized the tennis game genre. Smilebit's Jet Set Radio, in which players control a Tokyo