Slay the Spire 2 ships in Early Access, and Mega Crit patches it on a near-monthly cadence. This page tracks the headline main-branch updates from v0.103 (April 2026) through v0.111 (August 2026) — the window that reshaped the roster, the Act 3 boss, and three character kits.
Treat specific numbers as version-locked. The shape of each system is what carries forward.
The update timeline
| Version | Date | Headline |
|---|---|---|
| v0.111.0 | 13 Aug 2026 | Expect a Fight rebuilt; pure balance pass |
| v0.110.1 | 31 Jul 2026 | Poison rebuilt around Outbreak |
| v0.109.0 | 17 Jul 2026 | Quest Cards arrive; two new Neow relics |
| v0.108.0 | 02 Jul 2026 | Cooperative Arsenal — 14 co-op cards |
| v0.107.1 | 19 Jun 2026 | Major Update 2 — Aeonglass, Bestiary, Workshop, RNG rework |
| v0.106.1 | 22 May 2026 | Spire Rebalance — Infested Prism nerf, Wither rework |
| v0.105.1 | 08 May 2026 | Aeonglass awakens — Act 3 boss swap |
v0.111.0 — Expect a Fight rebuilt (13 Aug 2026)
A pure balance patch: nothing added or removed. Expect a Fight was rebuilt from an energy-gain card into a Strength-scaling Block card (15–16 Block plus 5–8 per Strength). Rend dropped to 1 energy with lower base damage, and 18 cards, 2 relics and 6 monsters were retuned. Indonesian localization and low-HP idle animations for every character also landed.
v0.110.1 — Poison rebuilt (31 Jul 2026)
The Silent’s Poison package was rebuilt around Outbreak, a 3-cost Rare that applies 9 Poison to all enemies and triggers it on the spot. A new 0-cost Sidestep (the card that was Follow Through, then Scare) joined the pool, and 23 cards plus 13 relics were retuned. Keyboard-only controls arrived.
v0.109.0 — Quest Cards arrive (17 Jul 2026)
A new quest-and-transform mechanic debuted: Dowsing becomes the powerful Abundance Power after you enter five ? rooms. Two new Neow relics (Dowsing Rod, Neow’s Sacrifice) and a wave of Silent reworks landed.
v0.108.0 — Cooperative Arsenal (02 Jul 2026)
Fourteen new cards built around aiding your allies arrived for co-op, alongside reworks to Outbreak, Tank and Tracking and a round of attack buffs.
v0.107.1 — Major Update 2 (19 Jun 2026)
The biggest main-branch update since launch. It merged the beta era into live at once:
- Aeonglass replaced the Doormaker as the Act 3 boss. The Doormaker is no longer in the live game.
- Bestiary added to the Compendium — track encountered monsters, their moves and animations.
- Steam Workshop support — official mod subscription and automatic update path.
- RNG rework to xoshiro256**, removing correlations between unrelated random systems.
- Three new Neow relics: Kaleidoscope, Fishing Rod, Silken Tress.
- Regent received nine card buffs; Infested Prism was reworked.
The beta groundwork (v0.107.0, 4 Jun 2026) had already simplified Aeonglass so its Ebb action gains Block instead of applying an Ebb debuff.
v0.106.1 — Spire Rebalance (22 May 2026)
A spire-wide balance pass. A new 0-cost Silent skill, Scare, joined the pool while an older attack retired. Infested Prism was heavily nerfed, Wither became an unplayable status, and over a dozen cards were reworked, buffed or nerfed.
v0.105.1 — Aeonglass awakens (08 May 2026)
Act 3 gained a brand-new boss: Aeonglass, which replaces the Doormaker. Axebot returned reborn with nearly double the HP, a new status card arrived, and eight major card reworks plus balance passes landed across the spire.
Where to track live
Mega Crit ships patches faster than any guide can follow. For the current version, the wiki.gg timeline is the live source of truth. If a build on this site contradicts the current patch, the patch wins.
For the boss that this update cycle introduced, see the Aeonglass guide. For the character kits those patches kept reshaping, see best builds for all 5 characters.