What's the first anime adapted from a galgame?


There are many anime which are adapted from galgames now, e.g., _School Days_
, _Kimi ga Nozomu Eien_ , _Shuffle!_ and so on.

What's the first anime adapted from a galgame?




[Anisearch](https://www.anisearch.com/anime/index) allows us to filter anime
based on the type of material adapted.  
[Using](https://www.anisearch.com/anime/index/page-1?char=all&adapted=102&sort=date&order=asc&view=1)
the more general term of visual novel as a category, the 2-episode OVA _Rance_
from 1993 seems to be the first anime adapted from such a medium.  
This OVA is very loosely based on the erotic RPG series of the same
[name](https://en.wikipedia.org/wiki/Rance_\(series\)) (potential NSFW
content).




It depends on what is meant by galgame, but a web search suggests* [Dragon
Knight](https://en.wikipedia.org/wiki/Dragon_Knight_\(video_game_series\)) is
one of the oldest. The game is released in 1989 and animated in 1991.

* [a source](https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1047759045), you may not be able to see it depending on location

