Terraria is a brilliant game that has taken up over 100 hours of my life. All I can be bothered to say about the game itself is that it can keep you entertained for many hours as there is no real end to what you can build or do. The collectors edition includes two cards that are random with every game but it seems there aren't that many of different ones out there. the cards aren't very important in my view as they are basically prints of an item or character in the game with some info that any person who has played is likely to know. The keyring however is a nice addition to the package. it is made from a rubbery plastic material that is quite bendy meaning it wont break easily, the picture in the product images does not do it justice as it looks very much different. the poster is of a nice quality and is double sided, one side of the various NPCs and the other of a random landscape which I use. I don't even know how to get my pet bunny that is included so that's a very bad point but I don't play Terraria so much any more so I wasn't that bothered.