It sounds like you’re referring to a repack of SimCity (likely the 2013 reboot) with Update 10.1 and 17 DLCs, released by a group called R.G. Mechanics — a well-known name in the scene for repacking games (especially older or offline versions).
No Multiplayer: Since this is a standalone repack, it does not support the original game's regional multiplayer features on EA servers. Gameplay Review (Post-Update 10.1) SimCity Update.10.1 17 DLC.Repack-R.G.Mechanics
to various international city sets (British, French, and German). Optimized Installation It sounds like you’re referring to a repack
This specific repack, SimCity Update 10.1 (including 17 DLCs) by R.G. Mechanics Traffic Fix: Improved lane-changing logic (vanilla cars only
Pre-Patched: The offline mode is usually configured out-of-the-box, meaning players don't have to navigate the defunct EA servers to play. The Legacy of SimCity (2013)
(which famously solidified the Offline Mode) along with all 17 released DLCs. 📦 Repack Features Update 10.1 (Final Major Patch) DLCs Included: