Separate the game update from the mod stack
The 1.15 release notice distinguishes two likely incompatibilities: non-updated mods and old saves. It recommends disabling all mods and ensuring the game is on a fresh save when troubleshooting post-update problems. This avoids risking an existing campaign while you test whether the game itself starts cleanly.
Dev Diary 194 previews 1.15 modding changes. It is useful context for mod authors, not a compatibility certification for any individual Workshop item.
| Clean-test result | Next step | What it establishes |
|---|---|---|
| Vanilla fresh save works | Check each mod's 1.15 note; add one at a time | Evidence points toward mod/save interaction |
| Vanilla fresh save fails | Record checksum, platform, logs and reproduce unmodded | Mods are not needed to reproduce |
| Only old campaign fails | Use the old-save rollback checklist | Version migration may be the issue |
| One mod reintroduces failure | Remove it and report exact version/steps to author | A reproducible conflict candidate, not proof of cause |
References: Paradox / Victoria 3 Steam Announcements: Update 1.15 release notes · Paradox / Victoria 3 Dev Diary 194: Favorites and 1.15 Modding
Safe isolation routine
Do not use a valuable modded campaign as the first test after a major patch.
- Record the live version/checksum, storefront and active mod list/order.
- Disable all mods using the platform's normal mod interface; do not delete Workshop data or manually edit files as a first step.
- Start a new temporary campaign, confirm whether the original symptom occurs, then quit without saving over a real campaign.
- If clean play works, check the mod page/author notes for explicit 1.15 compatibility and required dependencies.
- Re-enable one mod at a time, starting a fresh temporary test after each change; stop when the symptom returns.
- Share the minimal reproduction, checksum, mod version and error/log excerpt in the official bug-report channel or with the mod author; remove account/private paths before posting.
References: Paradox / Victoria 3 Steam Announcements: Update 1.15 release notes · Paradox / Victoria 3 Dev Diary 194: Favorites and 1.15 Modding
Community context and limits
The linked Reddit thread contains player comments about the 1.15 release, not verified test results. Do not treat a comment that a mod 'works for me' as proof it works with your checksum, dependencies or saved game.
References: Victoria 3 Reddit discussion: Update 1.15 release and old-save questions (user-generated) · Paradox / Victoria 3 Dev Diary 194: Favorites and 1.15 Modding
Before you play
- I recorded the current build/checksum and mod order.
- I disabled all mods before testing a fresh temporary save.
- I confirmed the vanilla result before adding mods one at a time.
- I used explicit author compatibility notes, not comments alone.
Frequently asked questions
Does turning off mods make an old save safe in 1.15?
No. Paradox separately warns old saves are incompatible; use the matching earlier branch for an old campaign.
Should I delete my mod folder?
Not as the first step. Disable mods in the supported interface, isolate the cause, and follow current platform/author instructions.
Does one successful run prove a mod is fully compatible?
No. It only confirms the tested version, checksum, dependencies and scenario.
Sources & revision notes
Editorial revision: November 6, 2026; not a gameplay test date. The reference notes identify source limits and version differences.
- Paradox / Victoria 3 Steam Announcements: Update 1.15 release notes (Official)
Official developer announcement, checked November 6, 2026: 1.15 is live; prior saves are incompatible because of map/mechanical changes. Back up before opting into 1.13/1.14 to finish a campaign. Non-updated mods may not work; disable mods and test a fresh save to isolate failures.
- Paradox / Victoria 3 Dev Diary 194: Favorites and 1.15 Modding (Official)
Developer diary with 1.15 modding changes and preparation guidance. It is not a guarantee that a particular Workshop item is compatible; use each mod author's current version notes and the live game checksum.
- Victoria 3 Reddit discussion: Update 1.15 release and old-save questions (user-generated) (Community)
User-generated discussion attached to the release announcement. Comments are anecdotal, may be incomplete, and are not evidence of save compatibility; follow Paradox's official branch and backup instructions.
November 6, 2026: first publication, checked against Paradox's 1.15 release and modding notes; no mod stack was tested.
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