: The update included numerous stability improvements, such as fixing "Out of Sync" (OOS) errors and improving the performance of the national focus interface. DLC-Specific Free Content
The "Collie" patch focused on improving accessibility and expanding the game's map without requiring a purchase:
If you own specific older DLCs, the 1.10 update also provided "free" bonus content for those expansions: Hearts of Iron IV: Battle for the Bosporus Free...
For those looking for the full experience, including the deep-dive historical and alternate-history paths for Turkey, Greece, and Bulgaria, you can find more details on the Official Paradox Interactive Page .
The was the free patch released alongside the Battle for the Bosporus country pack for Hearts of Iron IV . While the main expansion adds paid focus trees for Turkey, Greece, and Bulgaria, the free update provides significant refinements to existing Balkan content and general gameplay. Key Free Features of Update 1.10 ("Collie") : The update included numerous stability improvements, such
: The Heavy Cruiser 3D Asset Pack , which was previously exclusive to the Colonel Edition of the game, was merged into the base game for all players.
: Changes were made to how naval supremacy scales, affecting how players control the seas without needing specific DLC mechanics. While the main expansion adds paid focus trees
: Added a special infantry model with a Pickelhaube for Unaligned Germany.