I found the Minecraft comparisons inaccurate, I mean yes you have a building system and every square of the world is destructible. But where I couldn't stand to play Minecraft for very long due to my childhood of playing video games and watching TV reducing my imagination to a shriveled husk, I had lots of fun playing Terraria in co-op. Where Minecraft feels like an open sandbox to do whatever you want in, Terraria is more a large generated world that still has a structure of goals in mind. In fact, my friend and I did almost no building in Terraria at all other than setting up a home spawn for NPCs, the rest of it was exploring, discovering dungeons, getting loot, and so on.