All entries, including the original Trash Horror Collection ($5.99), Collection 3 ($4.99), Collection 4 ($2.99), and the upcoming Collection 5 , are available for PC.
You can often find the developer's work on Itch.io , where they sometimes host sales or offer "pay-what-you-want" models for certain titles. What’s Included? Trash Horror Collection Free Download
You can find and purchase the various installments of the collection on major indie and mainstream platforms: All entries, including the original Trash Horror Collection