Act 4 Final Ascent
🟡 Updated this yearThis mod may not work until the author updates it. Check for an update, or see the rollback guide.
Preview

🔍 Analysis
- 👍 1.0% endorsement rate
- 🏆 #23 of 748 Gameplay mods in this game by downloads
📋 About This Mod
Presenting: Act 4: Final Ascent
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Summary
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[]Proceed to Act 4 (no conditions required) at the end of Act 3, includes a highly strategic boss fight.
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]No penalty for dying in Act 4. Character Stats and Run History, have a separate Act 4 toggle.[]Playing Act 4 gives a bit more EXP towards Timeline unlocks.
Balance
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[]Act 1 to 3 Unchanged
[]Difficulty scales to # of players, Act 4 Difficulty Setting, and slightly to Ascension level
Easy Installation
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[]Go to StS2 Install Location: Right click the game name in your Steam Library on left bar, go to Properties -> Installed Files -> Browse
[]Create folder named mods where StS2 is installed.
[]Put Act4FinalAscent.dll, .pck, and .json in mods folder (for organizing, you can put it in a subfolder in mods folder, name it what you want).
Mod includes my Save Sync, Easy Save File Management!
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Modded has separate save files, but you can transfer unlocks and progression using my Save Sync in this mod.
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[](!) If this is your first time playing in Modded mode, Game Main Menu: Press to transfer progress from Vanilla.
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]If you go back to Unmodded later, .[]Extra: With Save Sync, you can also save up to 3 ongoing solo runs per profile! Start a new run without abandoning the last one!
[]If you are using other Save management mods, they should be compatible.
Bugs
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- []If you're playing on public-beta branch, any new update might break the mod until I patch it. Currently confirmed to work up to: v0. 101. 0
[]I greatly appreciate bug reports, and I will apply fixes within 1-2 days usually, please DM me the log file: Act4_Logs.txt at %USERPROFILE%\AppData\Roaming\SlayTheSpire2\logs
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[](!) If this is your first time playing in Modded mode, Game Main Menu: Press to transfer progress from Vanilla.
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[]Act 1 to 3 Unchanged
Act 4 Final Ascent is a gameplay mod that adds a custom act with new events and a strategic epic boss fight, giving players more opportunities to use their endgame decks. With 192 endorsements and nearly 20,000 downloads, it's a well-received addition for players seeking endgame content.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Solid community backing with 192 endorsements and nearly 20k downloads.
- Adds meaningful endgame content for players who've maxed out their decks.
- Custom act with events and a boss fight gives fresh challenges.
⚠️ Cons
- Only one act and one boss fight—might not be enough for players wanting a full expansion.
- No mention of compatibility with other gameplay mods, so potential conflicts exist.
- Last updated in April 2026, so it might not be actively maintained.
For Slay the Spire players who've beaten the main game and want more endgame challenges. If you're looking for a full expansion with multiple acts, this might feel thin. But if you want a focused, strategic boss fight and new events, this is a solid pick.
💡 Beginner Tips
- Make sure your game is up to date before installing to avoid version mismatches.
- If you use other gameplay mods, test this one in a separate profile to check for conflicts.
- Back up your save files before adding new content mods, just in case.
📊 Mod Details
- Game
- Slaythespire2 Mods
- Author
- iKenster
- Version
- 0.1.2f
- Downloads
- 19,506
- Endorsements
- 192
- Category
- Gameplay
- Created
- 3/12/2026
- Updated
- 4/5/2026
🧩 Commonly Used Together
Users add these mods to the same collections — a real compatibility signal, not an AI guess.
🔧 How to Install Slay The Spire II Mods
Download from Nexus Mods.
📖 Full step-by-step install guide for Slay The Spire II →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Slay The Spire II commands, item IDs, and more.
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