Final answer:
The 'biggest' Terraria mod is subjective, but The Thorium Mod and Calamity Mod are often considered to be among the largest in terms of content added to the game. Other mods like Spirit, Enigma, Shadows of Abaddon, and Overhaul are substantial but may not compare in volume.
Step-by-step explanation:
Within the Terraria gaming community, the largest mods offer expansive content that significantly enhances the base game. Identifying the 'biggest' mod can be subjective as it depends on the criteria being considered — number of features, size of the added content, or the overall impact on the gameplay experience.
As of the most recent information:
- The Thorium Mod is often considered one of the largest in terms of content, adding over 2000 new items, new enemies, and new biomes.
- Calamity Mod is also a contender, known for its post-Moon Lord content, including several new bosses, items, and even game modes.
- The mods listed in the question such as Spirit Mod, The Enigma Mod, Shadows of Abaddon, and The Overhaul Mod are substantial, but they may not match the sheer volume of content in Thorium and Calamity.
It's important to check the latest updates and community discussions to see which mods have grown and what they offer, as the modding scene is continuously evolving.