I'm currently enjoying the 3DS version of Terraria, I'll be playing Steamworld Heist soon, it's waiting to be played for sure.
So far in Terraria I've just beaten Skeletron and entered the dungeon, it's a very competent port of the mobile version and works great, with only occasional framerate dips but retains smooth play.
The only real downside has been the very small world sizes, and the occasional control limitation like not having a dedicate buff or heal button.
I'm especially curious to see if there's any potential exploit waiting in Terraria, since the game I think loads maps and character info from the SD card?