Terraria has over 5,000 items. Many of these are functionally useless in combat but essential for art. If you want to build a realistic medieval castle, you need sandstone, gray brick, mudstone, palladium columns, and living fire blocks. To gather these legitimately, you would need to create five different worlds, kill three different mechanical bosses, and wait for a specific moon phase. That isn't gameplay; that is work .
Most top-tier maps include all NPCs pre-housed in their preferred biomes or organized in a central "shopper's row". all items map terraria