: The "Trash Compactor" achievement—researching 50% of all items in Journey Mode—is cited as one of the rarest feats in the game.

However, the inclusion of Terraria on the Archive also navigates a complex ethical and legal gray area. Unlike truly “abandonware”—games whose copyright holders have ceased commercial support— Terraria remains an actively sold, supported, and profitable product. Re-Logic has always maintained a liberal stance on piracy, with founder Andrew Spinks famously stating that he would rather players steal the game than not play it at all. This permissive, fan-first attitude implicitly legitimizes the Archive’s role as a library rather than a piracy hub. It is a rare instance of a developer recognizing that access and preservation can coexist with commerce. By turning a blind eye to these archival copies, Re-Logic allows the Internet Archive to function as a public library would—lending out a copy of a book that is still in print, ensuring that even those without a library card (or a Steam account) can browse the shelves.

You can find several historical and platform-specific builds of the game: Terraria PC Archives