http://i3.photobucket.com/albums/y76/StarkeRealm/TRHeader.jpg
The game has been releasing fairly substantial content updates. The most recent patch (v1.1.1 on 12/15/11) only added a few new enemies and a snow biome, but the preceding update (v1.1 on 12/1/11) was a massive update including a new lighting engine, new enemy types, another new biome, rules for a new hard mode, a new background, and so on. These updates seem to require the player to generate a new world to take advantage of them. However the game already stores characters and worlds completely independently, so any equipment a character has accrued on one world can easily be transferred over to a new one.
The game has been releasing fairly substantial content updates. The most recent patch (v1.1.1 on 12/15/11) only added a few new enemies and a snow biome, but the preceding update (v1.1 on 12/1/11) was a massive update including a new lighting engine, new enemy types, another new biome, rules for a new hard mode, a new background, and so on. These updates seem to require the player to generate a new world to take advantage of them. However the game already stores characters and worlds completely independently, so any equipment a character has accrued on one world can easily be transferred over to a new one.