I played it once but didn't like it. I don't know but I couldn't play it... :S
My friend is addicted to it and he built some awesome things, castle, stadium...
Dykerosoft awesome one!
Play on fafaffy's server after getting it if you want to try it. Just buy a code from somebody for like...say 10m rsgp ($5.00 instead of buying it legitely for $21.00!) and give it a go. I built a house on his server over the period of like a hour. Its not finished yet, of course, but its still not bad. I shall post sometime when I get the chance all of my minecraft house work.
Terraria is a fun game, but very short and easy game to beat. There is no goals, and you don't get the same good feeling of when you build something awesome and show it to a friend compared to when you build something in minecraft.
I got all the best items in the game and over 20 platinum within 2 hours of playing terraria, along with beating every boss at least 5 times. after that, theres not really much to do in it.
I like games that are either super strict to the story, or have no strictness so I absolutely love minecraft! It has no end game, when I get bored I help out a friend or make a massive project like the mob spawner I'm working on to get enough gunpowder for my tnt spleef arena! Its All great fun!