Tencent released its first game QQ Tang (QQ堂) in 2004, which is based on its social media platform QQ. This was soon followed by QQ variant games such as Dungeon Fighter Online, a side-scrolling online beat 'em up game; QQ Fantasy, a 2D online game that incorporates elements from Chinese mythology; Xunxian, a 3D, online RPG; QQ Sanguo, an online casual role playing game set during the Three Kingdoms period; QQ Huaxia, an online RPG; QQ Dancer, an online musical dancing game that offers QQ IM interactivity; QQ Nanaimo, an online game set on a desert island where players maintain houses and pets; QQ Speed, a casual online racing game; QQ R2Beat, an online in-line skating game; QQ Tang, an "advanced casual game" with gameplay derived from Chinese literature; QQ PET, and a QQ IM-based desktop virtual pet game.[125] In 2008, Tencent Games established Lightspeed & Quantum, a video game development company.[126]