Anyone know what game this is from?

This is a CGI from an Eroge named Discipline: The Record of a Crusade. This Eroge came out in 2002. In 2004, a Hentai of the same name was released.

Proof:
https://vndb.org/v114
https://myanimelist.net/anime/2432/Discipline

Original Image:


As said below, you can also find a similar scene in Episode 2 of the anime. But the exact scene above is not shown since it is actually from the Eroge.
https://hentaimama.io/episodes/discipline-episode-2/
Around 10:58

Gallery:
https://hentaigamecg.com/Discipline-The-Record-of-a-Crusade/page/2/

This is a CGI from an Eroge named Discipline: The Record of a Crusade. This Eroge came out in 2002. In 2004, a Hentai of the same name was released.

Proof:
https://vndb.org/v114
https://myanimelist.net/anime/2432/Discipline

Original Image:


As said below, you can also find a similar scene in Episode 2 of the anime. But the exact scene above is not shown since it is actually from the Eroge.
https://hentaimama.io/episodes/discipline-episode-2/
Around 10:58

Gallery:
https://hentaigamecg.com/Discipline-The-Record-of-a-Crusade/page/2/

(that scene is from episode 2 about 10 min in)

Isn't that from Discipline? There is an anime of it as well: http://hentai.animestigma.com/discipline/