Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. The world is your canvas and the ground itself is your paint. Grab your tools and go! You can do many things in Terraria: make weapons and fight off a variety of enemies in numerous biomes, dig deep underground to find accessories, money, and other useful things, gather wood, stone, ores, and other resources to create everything you need to make the world your own and defend it. Build a house, a fort, even a castle, and people will move in to live there and perhaps even sell you different wares to assist you on your journey. But beware, there are even more challenges awaiting you... Are you up to the task?

Uraikus says

9/10 - Agree (5) Disagree (1)

The game adds classic RPG elements with many of the elements found in minecraft.You can spend hours exploring, fighting in dungeons, building, digging, and so much more. It also contains combining things to make tons of stuff, from potions, to amazing armor and weapons.
Its a blast at first,(and hours later) but it becomes slightly repetitive. After you have amazing armor and weapons it can take a lot of the fun out.
But overall I'd have to say the game is definatly worth your time and money.