Projectr V0400 Teamapple Pie Hot: [upd]

If you are looking for the latest build beyond v0400, the developer's Official FANBOX is the primary source for:

They maintain a high level of transparency with their backers, frequently posting "Development Progress" (開発進捗) reports. What is ProjectR? projectr v0400 teamapple pie hot

Early versions focused on the "Battle H" system, where tactical failures lead to mature-rated scenes. If you are looking for the latest build