What you get: Version 1.10.8 (No Step Back is not included). This is the last stable 32-bit build.
This is the core question behind the search. The short answer is no —not the current version. hoi4 32 bit
without significant workarounds that typically involve downgrading the game to an older, unsupported version. Paradox Interactive 1. The 64-Bit Transition Update 1.7.0 (Hydra) What you get: Version 1
| Metric | HOI4 1.5.4 (32-bit) | HOI4 1.13+ (64-bit) | | :--- | :--- | :--- | | Max RAM usage | 3.2 GB (crashes at 3.5 GB) | 8-12 GB (stable) | | Late-game speed (1943) | 20-25 seconds per month | 10-15 seconds per month | | Mod compatibility | Only pre-2018 mods | All current mods | | Crashes per 10 hours | 3-5 (memory related) | 0-1 | The short answer is no —not the current version
If you are getting memory errors on 64-bit HOI4, the problem is not bit-architecture—it is your page file, your mod list, or your RAM capacity. Increase your virtual memory to 16 GB, close Chrome, and enjoy the war.
Hearts of Iron 4 is now 64-bit - Paradox Interactive Helpdesk
For those who remember the transition, here is a real-world comparison (tested on an i5-8400, 8 GB RAM, GTX 1060):