Title: Zenith: Full Animation Adventure Series #1
Company: Himeya Soft
Format: 4 FDI images
Size: 3.48 MB Compressed
Game Type: Graphic Novel
Adult Content: Nudity, Sex (Censored)

More an anime-on-computer than an adventure game, there's only one section with any choices, and they're more of a "look at this" kind of choice than any plot twist. The story of female space marines versus male zombies. Pretty short, but almost all of it is animated.