At one moment, not very long time ago, the heroes titles became rare on the market. As we know, Ubisoft did a nice move to re-release some of the older games. Unfortunately, there is an issue, which may cause confusion to customers. Namely, the new Ubisoft releases (particularly talking about Heroes IV) are NOT exactly the same as 3DO releases. It comes evident when trying to update Ubisoft version with 3DO published patches or expansion sets. Quoting an answer from Ubi technical support: The re-release is a different software version and older expansionswill not work with the newer update. The 3DO expansions/patches cannot recognize Ubisoft's standard Heroes IV install, and currently there is no fix for that. Therefore owners of Ubisoft version should keep an eye on the Ubisoft patches and hope that also the expansions are re-released by Ubisoft or get their hands on Heroes IV Complete, which includes everything. If you are an owner of 3DO expansions and for some reason want another copy of the standard game, seek for an old 3DO release, or you will face some difficult problems.