難易度と内容はグラディウス2(アーケード版)とほぼ同じ。
ただし、遺跡ステージがあり、この点が重要。
Translated with ChatGPT
Gradius II (PC Engine CD-ROM²)
The difficulty and content are almost the same as Gradius II (Arcade Version).
However, there is a ruins stage, which is a significant point.