Might & Magic: Book I, Might & Magic II: Gates to Another World, Might & Magic III: Isles of Terra, Might & Magic IV, Might & Magic V: World of Xeen, Might & Magic VI: The Mandate of Heaven, Heroes of Might & Magic II: Gold Edition & Heroes of Might & Magic IV: Complete Edition, PC – Pay What You Want
Heroes of Might & Magic II is DRM free, the others registers on uPlay.
Uplay, ouch! Shame…