What Is Slay the Spire 2? Roguelike Deckbuilder, Explained

Slay the Spire 2 is a roguelike deck-building game by Mega Crit — the creator of the genre-defining original — in which you build a card deck run by run and climb a procedurally generated tower that resets when you die. It launched into Steam Early Access on March 5, 2026 at $24.99, and it is the series' first game with online co-op: up to four players can climb together. As of September 2026 it is still in Early Access; the 1.0 date is to be confirmed.

The Short Answer

• Genre: Roguelike deck-builder / strategy card game
• Developer & publisher: Mega Crit
• Release: March 5, 2026 (Steam Early Access, Windows / macOS / Linux)
• Price: $24.99 USD (will increase after Early Access, per the developers)
• Roster: Five characters — returning Ironclad, Silent and Defect, plus new Regent and Necrobinder
• Big new feature: Four-player online co-op with dedicated multiplayer cards
• Reception: Launched to a massive ~574,000 concurrent-player peak, then a very public "Mixed" review-bomb period — details below

The Premise

The original Spire slept for a thousand years — "its secrets buried and its horrors forgotten" — and has now reopened, "hungrier and more dangerous than ever." The store page pitches it as the return of "the ultimate roguelike deckbuilder": new cards, relics and potions, a new and returning cast of characters with their own motives and secrets, and a narrative layer the first game never had. Spire lore is now something you actively uncover, unlocking fragments of its timeline and encountering its oldest residents across many attempts.

How a Run Works

Each run generates a random seeded map of events, enemies and loot. You pick a path, fight turn-based battles (spending energy on attack, block, skills and powers), take card rewards to shape your deck, and try to survive three acts of escalating bosses. Death resets everything — but unlocks do not: cards, relics and Ascension difficulty levels persist across runs. Community tier lists describe the flexible, run-defining cards as the ones worth hunting early, a good summary of what the game rewards.

What's Different from Slay the Spire 1

Reviewers who sank a thousand-plus hours into the original consistently describe the sequel as "refined, not remixed" — the core loop is instantly familiar, but the details change how you play:

• Co-op is the headline feature. Within each combat turn, all players play cards simultaneously in a real-time free-for-all; enemies get dramatically more HP to compensate. It is deliberately conversation-driven: you can't see a teammate's whole hand, but you can inspect one card at a time, and you can draw on the map to plan routes.
• The returning characters are reworked, not copied. The Silent gained the Sly keyword (discarding a Sly card plays it for free), and IGN's reviewer notes the sequel leans less on energy upgrades than the original did. The Defect got a "complete glow-up" — a bulkier chassis but the same orb-channeling identity.
• Two versions of Act 1 ship at Early Access, and the full release is expected to add alternate Acts 2–3 and a final act.
• It plays harder. Elites are riskier relative to their rewards, each act opens with a choice of three powerful-but-double-edged act modifiers, and the difficulty ceiling is now Ascension 10 (the original went to 20, so the scale itself was renumbered and tuned).
• Rough edges are visible by design. A handful of MS Paint-style stand-in art pieces remain — an intentional Early Access signal — alongside the daily climb mode, unlockable card and relic upgrades, and a live feedback tool inside the game.

How Popular Is It?

Slay the Spire 2 was one of 2026's biggest PC launches. Its first week hit over 574,000 concurrent players (SteamDB records the all-time peak at 574,638 on March 8, 2026). As a benchmark, the original game took years to build its audience — STS2 did this in days.

The curve settled rather than collapsed. Per Steam Charts: March 2026 averaged 279,412 players, August 2026 averaged 63,728 with a 105,197 monthly peak, and the game still had roughly 73,000 players online and a 92,961 24-hour peak as of early September 2026 — numbers most deck-builders never see even at their height.

The Honest Part: Mixed Reviews and Two Review Bombs

The game's Steam rating is Mixed — not because sales or player counts fell, but because of two coordinated waves of negative reviews in spring 2026. Beta balance patches that weakened "infinite" combo strategies and an Act 3 boss fight triggered an outcry led largely by the game's huge Chinese playerbase; at one point more than half of all reviews were Chinese-language. Mega Crit took the feedback publicly seriously and kept iterating on its bi-weekly beta patches — the controversial Doormaker boss was even removed and replaced by Aeonglass in v0.107.1. We cover the whole episode, sources and all, in the FAQ page. If you are buying now, you are buying a game mid-tuning — which is exactly what Mega Crit says Early Access is for: "Until the game feels great! … perhaps in the same 1–2 year range."

Should You Play It?

The consensus across long-playtest reviews is that STS2 feels "largely complete" even in Early Access, and is one of the easiest recommendations in the genre — if turn-based deck-building appeals at all, start with this game or its predecessor. New players should expect the sequel to be tougher and less forgiving than the first game felt in its early months; veteran "Slayers" should expect familiar instincts to mostly transfer, with a few expensive re-learning moments (the Regent character alone humbled IGN's reviewer for roughly 40 attempts before its first win).