Every counted update for Hearts of Iron IV

1. 27 Oct 2026Hearts of Iron IV | QoL Patch Notes 1.19.4 (Updated Nov. 5th)+a month
2. 17 Sep 2026HOI IV | Patch 1.19.3+2 months
3. 6 Jul 2026HOI IV - Open Beta Summer Edition™+6 days
4. 30 Jun 2026Thunder at our Gates | Patch 1.19.2+5 days
5. 25 Jun 2026HOI IV | Open Beta Weekend (1.19.2)+a week
6. 17 Jun 2026Thunder at our Gates | Patch 1.19.1+5 days
7. 12 Jun 2026Hotfix 1.19.0.1+a day
8. 11 Jun 2026Thunder at our Gates - Available Now!+a day
9. 10 Jun 2026Thunder at our Gates | Patch Notes (1.19.0)+3 weeks
10. 20 May 2026Hearts of Iron IV | Patch 1.18.2+a week
11. 13 May 2026HOI IV - Open Beta Update V+2 weeks
12. 29 Apr 2026Peace For Our Time | Patch 1.18.1+a week
13. 22 Apr 2026Peace for Our Time | Available NOW!+3 weeks
14. 26 Mar 2026Warships of the Pacific - Hotfix, 1.17.5.2+a week
15. 19 Mar 2026Warships of the Pacific - Hotfix, 1.17.5.1+3 days
16. 16 Mar 2026Warships of the Pacific - Patch Notes, 1.17.5+2 weeks
17. 25 Feb 2026(Very small) Hotfix - Patch 1.17.4.1+2 months
18. 10 Dec 2025NCNS | Patch 1.17.3+6 days
19. 4 Dec 2025NCNS | Patch 1.17.2+a week
20. 27 Nov 2025NCNS Patch 1.17.1.1+a day
21. 26 Nov 2025NCNS | Patch 1.17.1+5 days
22. 21 Nov 2025No Compromise, No Surrender | Hotfix & Korean Localization+a day
23. 20 Nov 2025No Compromise, No Surrender | Patch Notes, Live Stream & Mods!+5 months
24. 16 Jun 2025War Effort | Patch 1.16.9+a month
25. 15 May 2025Operation Brainstorm | Prototype Vehicles Available Now!+2 weeks
26. 28 Apr 2025Patch Notes & Developer Diary | Operation EAR+a month
27. 27 Mar 2025Operation SHOULDER | War Effort Patch 1.16.3+a week
28. 20 Mar 2025Studio Gold Update & Patch Notes for Operation Knee+a week
29. 12 Mar 2025Patch Notes | Operation HEAD, Checksum 48b7+8 months
30. 24 Jun 2024Hotfix | Patch 1.14.7 Checksum: f03b+2 weeks
31. 10 Jun 2024Soviet Union 2D Art Pack | War Effort Update 1.14.6 [Checksum: 5a08]+2 months
32. 21 Mar 2024Steam Store Update | Patch 1.14.3 [Checksum 21DE]+3 months
33. 12 Dec 2023Stella Polaris | Patch 1.13.6+a month
34. 1 Nov 2023Stella Polaris | Patch 1.13.5 Changelog - Checksum f730+a week
35. 19 Oct 2023Stella Polaris | Patch 1.13.4 Changelog - Checksum 15a3+a week
36. 12 Oct 2023Stella Polaris Hotfix 1.13.3+a day
37. 11 Oct 2023Stella Polaris Hotfix 1.13.2+a day
38. 10 Oct 2023Arms Against Tyranny Available NOW!+a day
39. 9 Oct 2023Arms Against Tyranny | Change Log+4 months
40. 23 May 2023Patch 1.12.14 Medals Hotfix+a week
41. 16 May 2023War Effort - Operation Alpha [1.12.13 Checksum b721]+a week
42. 5 May 2023War Effort - Operation Alpha [1.12.13 Open Beta]+3 weeks
43. 13 Apr 2023War Effort - Operation Cockpit [1.12.12 - Checksum a266]+a week
44. 6 Apr 2023War Effort - Operation Cockpit [1.12.12 OPEN BETA]+4 weeks
45. 9 Mar 2023War Effort - Operation Pike Patch 1.12.11 [Checksum 92f5]+6 days
46. 3 Mar 2023War Effort - Operation Pike Open Beta [1.12.11] Checksum 66ce+2 weeks
47. 16 Feb 2023Operation Sabre Patch 1.12.10 [Checksum - 0f26]+a week
48. 3 Feb 2023War Effort - Open Beta & Developer Diary! [1.12.10]+a week
49. 25 Jan 20231.12.9 Hotfix Patch+a week
50. 17 Jan 2023War Effort - Operation Capital [1.12.8 - Checksum 9d51]+a month
51. 8 Dec 2022War Effort - Operation Source [1.12.7 - Checksum b738]+2 weeks
52. 24 Nov 2022War Effort - Operation Tungsten [1.12.6 - Checksum a6ba]+3 weeks
53. 3 Nov 2022Avalanche 1.12.5 - By Blood Alone - Checksum 18aa+2 weeks
54. 18 Oct 2022Avalanche 1.12.4 - By Blood Alone - Checksum f96e+a week
55. 6 Oct 2022Avalanche 1.12.3 - By Blood Alone - Checksum 6b16+6 days
56. 30 Sep 2022Avalanche 1.12.2 - By Blood Alone - Checksum e45c+3 days
57. 27 Sep 2022Avalanche 1.12.1 - By Blood Alone - Checksum 45c2+a month
58. 23 Aug 2022Barbarossa 1.11.13 - Nakama Crossplay - Checksum d173+2 months
59. 9 Jun 2022Patch 1.11.12 "Barbarossa"+4 weeks
60. 12 May 2022Patch 1.11.11 "Barbarossa"+a month
61. 7 Apr 2022Barbarossa Patch 1.11.10 - Checksum 09ac+4 weeks
62. 10 Mar 2022Patch 1.11.9 "Barbarossa"+2 weeks
63. 24 Feb 2022Patch 1.11.8 "Barbarossa"+a week
64. 17 Feb 2022Patch 1.11.7 "Barbarossa+3 days
65. 14 Feb 2022Barbarossa Patch 1.11.6 - Checksum: 630e | LIVE | Patch Notes+2 weeks
66. 27 Jan 2022Hearts of Iron IV: Barbarossa Patch 1.11.5 Notes+a month
67. 14 Dec 2021Hearts of Iron IV: Patch 1.11.4 - Barbarossa+2 weeks
68. 25 Nov 2021Hotfix - Patch 1.11.2 - Armour Packs+3 months
69. 5 Aug 2021Patch 1.10.8 - Multiplayer Hotfix+2 months
70. 3 Jun 2021Patch 1.10.7 "Collie" - Hotfix+a day
71. 2 Jun 2021HOI4 5 Year Anniversary: Patch Notes | Patch 1.10.6 "Collie"+3 months
72. 3 Feb 2021Patch 1.10.4 - Multiplayer Security Fix+2 months
73. 26 Nov 2020Patch 1.10.3 Changelog (Big Sur fix)+2 weeks
74. 12 Nov 2020Patch 1.10.2 - Changelog+4 weeks
75. 15 Oct 20201.10 'Collie' Update - Changelog+a day
76. 15 Oct 2020Battle for the Bosporus: Available Now+4 months
77. 4 Jun 2020Patch 1.9.3 now Live: Balance and Bugfixing+4 weeks
78. 6 May 2020Patch 1.9.2: Bugfixes and Balance+4 weeks
79. 8 Apr 2020Patch 1.9.1: New Releasables, Art, Balance Tweaks and More!+a month
80. 5 Mar 20201.9.1 BETA Patch Available Now+a week
81. 25 Feb 2020Free 1.9 "Husky" Update is Now Live! (And not save game compatible!)+2 weeks
82. 7 Feb 2020Patch 1.8.2: Security Fix+2 months
83. 14 Nov 2019Launcher Hotfix 1.8.1 LIVE+a day
84. 13 Nov 2019The 1.8 "Fork" Update is now LIVE!+a day
85. 12 Nov 2019New Launcher on November 13th+2 months
86. 11 Sep 2019Dev Diary: Vichy and Free France+2 months
87. 26 Jun 20191.7.1 "Hydra" now live!+3 weeks
88. 4 Jun 20191.7 Hydra Update is Live!+2 months
89. 3 Apr 2019Patch 1.6.2 Ironclad is Live+3 weeks
90. 13 Mar 2019Patch 1.6.1 Live Now!+a week
91. 28 Feb 2019Update 1.6: Ironclad is now live!

Only posts Steam itself marks as updates are counted, and fixes released within the same week count as one — a burst of hotfixes around a release is one event, or the median gap collapses and every game looks overdue. The whole method