Games like Apostle
Games like Apostle include Summer Memories, Ideology in Friction, Mysteria ~Occult Shadows~, Yokai's Secret, and The Chosen RPG. We matched them by the tags players give Apostle on Steam (RPG, Indie, Sexual Content, Nudity, and JRPG): closest matches first, and among equally close ones the better-known games.

Summer Memories
Shared: Sexual Content · Nudity · RPG

Ideology in Friction
Shared: RPG · Sexual Content · Indie

Mysteria ~Occult Shadows~
Shared: Sexual Content · RPG · Nudity

Yokai's Secret
Shared: Sexual Content · Indie · Nudity

The Chosen RPG
Shared: RPG · Nudity · Indie

Sister Travel
Shared: RPG · Indie · Sexual Content

Yarimono
Shared: Sexual Content · RPG · Nudity

Seek Girl Ⅲ
Shared: Sexual Content · Indie · Nudity

Kunoichi Botan
Shared: RPG · Indie · Sexual Content

Seed of Evil
Shared: RPG · Sexual Content · Indie

President Yukino
Shared: RPG · Sexual Content · Indie

The Imperial Gatekeeper
Shared: Sexual Content · RPG · Nudity

False Myth
Shared: RPG · Indie · Sexual Content

The Curse of Kubel
Shared: RPG · Indie · Sexual Content

West Sweety
Shared: Sexual Content · Nudity · Indie

NALOGI
Shared: Sexual Content · Nudity · Indie

LEWDAPOCALYPSE Hentai Evil
Shared: Sexual Content · Nudity · Indie

SiNiSistar 2
Shared: Sexual Content · Nudity · RPG

Tina: Swordswoman of the Scarlet Prison
Shared: RPG · Indie · Sexual Content

FALL IN LABYRINTH
Shared: Sexual Content · Nudity · RPG

Seek Girl:Fog Ⅰ
Shared: Sexual Content · Nudity · Indie

Hentai Killer
Shared: Sexual Content · Nudity · Indie

Lost
Shared: Sexual Content · Nudity · Indie

Lilitales
Shared: RPG · Sexual Content · Indie