Non-renewable items
Some items are non-renewable, meaning that in any given world they are in a finite supply from what is naturally available in the world. Some of these items are plentiful and easy to find and use, while others are rare items like rare paintings or the Lihzahrd Altar.
Non-renewable items are finite, so the player can run the world out of them. In general, this is very hard to do or just easy to avoid, but some non-renewable resources can become contested in large multiplayer worlds. In Journey Mode, any item obtainable by the player can be researched and duplicated, allowing all items to be renewable.
Non-renewable items include the following:
- Block types generated with the world are generally very plentiful, but some cannot be crafted or otherwise created. Even being finite, it is very difficult to run out of these blocks unless the player puts in effort to rid the world of these blocks.
- Chests sometimes have items unique to them that cannot be obtained from fishing up Crates. Chest furniture items themselves are also often non-renewable.
- Uncraftable furniture, especially from locations such as the Dungeon or Jungle Temple.
- Background walls are often unsafe when generated in the world, but safe when placed by the player. Some of these walls have other methods to place the unsafe variants, while other unsafe walls are non-renewable.
- Any item which requires a non-renewable resource to be obtained, such as Clay Pots being crafted from Clay Blocks.
- Most items obtained from NPCs are renewable; however, specifically the Fuzzy Carrot and Angler armor from the Angler are only available once per character.
Non-renewable items are few enough that they can be listed individually. A few of those are "semi-renewable", produced by something that is plentiful but ultimately finite.
Plentiful but finite
- Clay, Silt, Slush, Desert Fossil, and Ash. This extends to items created from the above materials, including:
- Red Brick (clay) and Iridescent Brick (ash).
- The Amber Mosquito.
- A few kinds of unsafe walls, most notably unsafe Living Wood Walls due to only their unsafe variant spawning Gnomes. Unsafe Dirt and Grass Walls are renewable through the Clentaminator, however.
- Hellstone, Hellstone Brick, Dungeon Brick, and Lihzahrd Brick.
In celebrationmk10 and get fixed boi worlds, Jungle Mimics can spawn and produce Clay, Silt, Slush, and Ash (through Iridescent Brick) through its "stuff cannon" attack, making them renewable. It also allows Ice Blocks to be renewable pre-Moon Lord.
Location-specific generation
Many larger entities and items appear in the world in relatively small quantities, and can potentially be limited. Compared to blocks, most of these are never consumed or used up by the player. This also extends to limited chest loot that is unobtainable from fishing or other methods.
- Altars, especially the Lihzahrd Altar, of which there is only 1. Due to their value in crafting, keeping at least one Altar present near a Pylon is useful, and the Lihzahrd Altar should not be trashed.
- Hellforges
- Many particular paintings (see page for details)
- Several decorative banners (see page for details)
- Non-crafted Chests (see page for details)
- All non-crafted Statues besides the Bast Statue.
- The Terragrim, Glow Tulip, and The Dirtiest Block
- Dungeon, Jungle Temple, and obsidian furniture (those that can be crafted require Hellstone, with the exception of Obsidian Platforms)
- Water Bolt and Lihzahrd Furnaces
Traps
- Dart Traps, Venom Dart Traps, and Super Dart Traps
- Geysers and Flame Traps
- Spikes and Wooden Spikes
- Spear Traps and Spiky Ball Traps
Chest loot
Most primary loot items from chests are available by fishing, while secondary loot items are often available through a variety of different means. There are a number of exceptions, however:
- Mace
- Shoe Spikes
- Flare Gun
- Band of Regeneration
- Cloud in a Bottle
- The Flying Carpet and Pharaoh's Robe from Pyramids
Sandstone Chest(Desktop, Console and Mobile versions):
Dead Man's Chest(Desktop, Console and Mobile versions):
- Bee Minecart(Desktop, Console and Mobile versions)
- Ladybug Minecart(Desktop, Console and Mobile versions)
- Sunflower Minecart(Desktop, Console and Mobile versions)
All Biome Chest weapons are non-renewable, but the chests themselves are renewable by shimmering their respective Biome Key.
Becoming non-renewable as the game progresses
Some items may be renewable in a new world, but they become non renewable as the game progresses:
- The Gray Zapinator(Desktop, Console and Mobile versions) is renewable from the Traveling Merchant pre-Hardmode after any boss kill, but it is replaced by the Orange Zapinator in Hardmode.
- The Bone Key becomes non-renewable after defeating Skeletron.
- The Cascade, renewable after defeating Skeletron, becomes non-renewable in Hardmode as it is replaced by Hel-Fire.
- Similarly, the Demon Heart, Advanced Combat Techniques, Torch God's Favor, and the Artisan Loaf become unavailable for a character once they have used one.
Renewable in some secret world seeds
These items are generally non-renewable, but they are renewable in some specific secret world seeds(Desktop, Console and Mobile versions). This includes:
- Celebrationmk10
- Terragrim, sold by Princess during Blood Moon
- Dropped by the Jungle Mimic:
- Angel Statue
- Red Potion, an item which is completely unobtainable in normal seeds
- Fart in a Jar can be decrafted into Cloud in a Bottle via Shimmer
- Being renewable due to the "stuff cannon" attack of the Jungle Mimic:
- Ash Block
- Silt Block and Slush Block, and then, Amber Mosquito
- Red Brick, and then, Clay Block
- Don't dig up
- Mimics and its variants can spawn pre-Hardmode. This makes some loots in Golden Chest renewable pre-Hardmode:
- Because Get fixed boi combines most of the features from all the other secret world seeds, these items above are all renewable in it.