- Worlds are now 65536 tiles across, made as you explore, with three layers: the overworld, the caves and the deep caves
- New land: continents, mountain ranges, lakes, atolls, desert oases with palms, acacia savannas and cold poles, with biomes twice as big
- The deep caves: great halls of deeprock, hot sulphur lakes, frozen ice caves, rich iron and the only gold
- Your body now has a temperature: wear the straw cloak in the cold and the straw hat in the heat
- Progress through the copper, brass and iron ages, each with its own guide in the book (K)
- Brass from copper and zinc, brass tools, the brass furnace and the brass anvil
- Fire bricks, the charcoal pit, the bloomery for iron blooms, wrought iron, and the coke oven
- The iron furnace: six slots, three times as fast, and the only one that melts iron
- Iron tool heads are now forged on the wrought iron anvil
- The barrel: fill it at a lake, seal it, and dirt turns to mud
- Old chests in abandoned homes, campsites, desert wells, stone ruins and old mineshafts deep in the caves
- Every wood (oak, birch, spruce, cherry, alder, palm and acacia) now has its own planks, walls, doors and chests
- Point at anything to see what it is, and how long a crop, a pit or a furnace still needs
- Steam achievements for the ages
- New furnace sounds and animated smoke, and rain is rarer
- Smelting takes longer, and molds crack now and then
- The changelog scrolls, the anvil screen fits any window, and the pause menu is tidier (the world saves when you leave and every 5 minutes)
- Worlds from 1.2.1 are converted when you open them
The full list is in the in-game changelog. Thanks for playing!