Here is the full list of all 20 Warrior Beneath Heaven achievements.
Complete the easy level
Complete the noraml level
Finish a stage within 15 seconds
Finish a stage within 30 seconds
Finish ShangGuan Yan's Story
Finish FuRuo Xu's Story
Finish YuYuan Jin's Story
Finish LiuWei Yang's Story
Finish Jin Kong's Story
Finish Xe Shao Zhi's Story
Finish Adony's Story
Finish Murong Jue's Story
Finish Lily's Story
Finish Zi Li's Story
Finish Yuwen's Story
Finish AnLu Shan's Story
Finish Yue Lingzhi's Story
Finish LunChine's Story
Finish Tao's Story
Finish Torricks's Story