: Terraria is a paid game (typically $9.99 USD ) and does not have a free-to-play official version. You can find it on the Apple App Store for iOS or Google Play for Android.
: Indicates the file is compiled for 64-bit ARM architecture (standard for modern iPhones and iPads). os100 : Likely refers to a minimum requirement of iOS 10.0 . : Terraria is a paid game (typically $9
The specific string "download-terraria-v4-v100876-unk-64bit-os100-ok14-user-hidden-bfi-ipa" refers to a pirate or non-official iOS application package (IPA) for . os100 : Likely refers to a minimum requirement of iOS 10
These complex filenames are typical of third-party "cracked" app stores or file-sharing sites that include metadata about the device compatibility and versioning in the title. : Official versions receive parity updates with PC,
: Official versions receive parity updates with PC, including massive content updates like "Labor of Love" and upcoming 1.4.5 features. 4.5 or how to transfer a save file to an official copy? Mobile version history - Official Terraria Wiki
: Often used in file naming conventions to denote compatibility with specific iOS versions (possibly iOS 14).