Slay the Spire 2 First-Run Guide
Early Access climbs are messy. This guide prioritizes stable decisions over theorycraft — and points you to the right calculator when the math gets noisy.
1. Pick a character for learning, not flexing
Your first serious runs should maximize feedback. Prefer a roster member with readable win conditions (clear damage plan + clear defensive plan). Use the characters overview to compare HP, starters, and themes — then commit for several runs instead of hopping every death.
2. Act 1: path for information, not greed
- Take fights that teach enemy patterns before hard elites if you are under-rolled.
- Prefer removals when the deck feels clogged with low-impact starters.
- Shop only when you know what hole you are buying for (block, draw, or damage).
3. When to open a calculator mid-run
| Situation | Tool |
|---|---|
| Wondering if you’ll see a key card next turn | Draw probability |
| Necrobinder soul/doom lethal math | Soul calculator |
| Regent forge investment vs immediate power | Forge simulator |
| Co-op pairing / secondary roles | Co-op synergy |
4. Build principles that survive patches
- One primary win condition, one defensive plan, one energy/draw engine.
- Do not add “interesting” cards that dilute both plans.
- Re-evaluate after every elite — if the deck cannot block a spike, fix block first.
5. Learn systems once
Keywords and resources change between patches. Keep mechanics notes open while you climb, then return to tools for concrete numbers. For multiplayer, read co-op multiplayer before blaming RNG.
STS2Calc is independent and not affiliated with Mega Crit. Balance can change in Early Access — treat numbers as planning aids, not absolute truth.