What is The Acaeum?

The Acaeum (acaeum.com) is a Dungeons & Dragons RPG collectibles database. It is built for people who collect D&D materials and want printing information, cover scans, and estimated values. If you are trying to identify a specific printing of a rulebook, module, or periodical, or you want a rough sense of what a collectible item is worth, this is the kind of reference site you would check. It is not a store or a general D&D rules resource; its focus is the collecting hobby.

What the site covers

The Acaeum organizes its catalog around the physical products collectors care about. Its main sections are:

• Rulebooks & Sets – core books, boxed sets, and similar foundational products
• Modules – adventure modules, a major focus for D&D collectors
• Periodicals – magazines and other serial publications
• Miscellaneous – items that don't fit the other categories
• The Rares – a dedicated section for scarce or high-interest collectibles

For these items, the site provides printing information, cover scans, and estimated values. That combination is what makes it useful for identification: two copies of the same module can look nearly identical but come from different printings, and the printing often determines both authenticity questions and value.

How collectors use it

A typical use case: you have an old module with no clear print indicator, and you want to know which printing you own and whether it is a common or scarce version. You would look up the title, compare your copy against the cover scans and printing details, and check the estimated value range. The site also includes a search function, a library, forums, and links to related subwebs, so you can move from a single item lookup into broader discussion or reference material.

What to keep in mind

• Values are estimates. The site describes estimated values, not live market prices. Treat them as a reference point rather than a quote.
• It is a hobby database, not a marketplace. Nothing in the site description indicates it sells items or processes payments.
• Coverage is D&D-focused. The description scopes it to Dungeons & Dragons RPG collectibles, so do not expect other RPG lines to be covered the same way.
• Use the forums for edge cases. Printing variations and authenticity questions often get resolved in collector discussion rather than in a static listing.

If your goal is identifying a D&D collectible or getting a baseline value estimate, The Acaeum is a reasonable first stop. If you need current sale prices or want to buy and sell, you will need a marketplace in addition to this reference.