Slay the Spire 2
Companion Mod
Card tier ratings during rewards, run tracking, and community analytics for Slay the Spire 2.
How It Works
Play the game
The mod runs in the background. It uses your Steam identity so there's nothing to configure.
Runs upload automatically
When a run ends, the full history is captured and sent to Knowledge Demon — deck, relics, potions, every choice.
Browse your stats
Sign in with Steam on the website to see your run history. Your data also feeds into community analytics like tier lists and win rates.
Features
Card Tier Overlay
Hold Shift during card rewards to see community tier ratings. Each card shows a grade (S – F) and its impact on win rate, calculated from thousands of runs.
Full Run History
Deck, relics, potions, floor-by-floor map path, card choices, event decisions, shop purchases, damage taken — every detail, captured automatically.
Steam Authentication
The mod authenticates via your Steam identity — no accounts or tokens needed. Sign in on the website to see your personal stats.
Community Analytics
Your runs power card tier lists, deck size curves, and win rate breakdowns by character and ascension level.
Existing Run Import
On first launch, the mod uploads your existing run history. You can also upload manually from the website.
Doesn't Affect Gameplay
Read-only — never modifies saves, unlocks, or ascension progress. Compatible with other mods.
What Gets Tracked
Installation
Download the zip above
Extract into your game's mods/ folder
Enable the mod in-game, then restart
Steam\steamapps\common\Slay the Spire 2\mods\~/Library/Application Support/Steam/steamapps/common/Slay the Spire 2/SlayTheSpire2.app/Contents/MacOS/mods/~/.steam/steam/steamapps/common/Slay the Spire 2/mods/Frequently Asked Questions
Does the mod affect gameplay?
No. Knowledge Demon is purely informational — it reads game state but never modifies it. Your saves, unlocks, and ascension progress are completely unaffected. It's safe to use in any game mode.
Is it compatible with other mods?
Yes. The mod has no dependencies and doesn't modify gameplay systems, so it works alongside other STS2 mods without conflicts.
What data is collected?
Only completed run data — deck, relics, potions, floor history, and choices. No personal information beyond your Steam ID. Runs shorter than 5 floors and abandoned runs are not uploaded.
Do I need an account?
No. The mod uses your Steam identity automatically. To view your runs on the website, just sign in with Steam — no separate account needed.
Can I see my existing runs?
Yes! On first launch, the mod backfills your existing run history automatically. You can also upload manually from the website.
Give it a try