All that I know is S06 in the last image appears to be a reprint of Barver Battle Saga. It looks similar to the Li Cheng reprint that's in the gallery so maybe the translation was released (or rereleased) by Li Cheng themselves?
Hmm....I think rereleased it by Li Cheng themselves. Characteristics of Li Cheng translation have mix of Simplified and Traditional Chinese.(But It is Li Cheng's themselves earlier chinese translations only. The late chinese translations period is all Simplified Chinese).
As an example, have these chinese name. (游戲,那里,网絡,圣戰士 etc.., Simplified: 游戏,那里,网络,圣战士, Traditional: 遊戲,那裡(or 那裏),網絡,聖戰士 etc..)