User blog comment:Aggserp/Is Terraria something like a copy of Minecraft?/@comment-3157150-20130213135806

There is chat in Terraria, though it's only usable on a server (there is no point in being able to chat on a single player world).

Minecraft and Terraria are both of the "sandbox" genre, just that Terraria uses more RPG elements (similarly to Castlevania) while Minecraft uses more building elements.