Moonsigil Atlas Wiki

• Genre: Roguelike Deckbuilder, Turn-based Strategy
• Platform: PC (Windows, Linux), Steam Deck Verified
• Price: $19.99 / €19.99
• Content: 250+ cards, 3 characters, 3 Acts, 3 Titans, 31 Steam Achievements
• Demo: Free demo available on Steam with 100+ cards and 2 characters

Traditional deckbuilders like Slay the Spire or Balatro ration power through energy pools — play a few cards, end turn, wait for refresh. Moonsigil Atlas removes that ceiling entirely.

• Space is your resource: Play as many sigils as fit on the grid each turn.
• Geometry matters: Card shapes, rotation, and placement determine combo potential.
• Non-linear upgrades: Reshape cards, remove tiles, inscribe runes — not just +damage.
• Board manipulation: Enemies and bosses occupy and alter grid tiles, forcing spatial adaptation.

The result is a hybrid of deckbuilding depth and spatial puzzle satisfaction — often described as "Slay the Spire meets Tetris."

1. Draw 5 cards at the start of each turn from your deck. When empty, the deck shuffles.
2. Select a sigil from your hand. Each has a unique shape (1–8 tiles).
3. Rotate and place the sigil on the central grid. Valid placements highlight available spaces.
4. Repeat placing sigils as long as you have hand cards and board space.
5. End turn when satisfied. Enemies act, then your persistent effects trigger.
6. Defeat all enemies to win the encounter and receive rewards.

• Learn rotation early. Right-click or use rotate controls to fit awkward shapes.
• Don't hoard space. Unlike energy games, unused board space is wasted potential each turn.
• Pick repositioning cards when offered — moving existing sigils often beats drawing new ones.
• Block efficiently: A single well-placed shield sigil can block multiple enemy attacks.
• Visit upgrade nodes to reshape oversized sigils — removing tiles makes them easier to fit later.

Between fights, navigate a branching map with combat nodes, events, shops, rest sites, and elite encounters. Plan your route balancing card rewards, upgrade opportunities, and healing. Each Act ends with a Titan boss fight that tests both deck power and spatial adaptability.

There is no energy bar, mana pool, or action point limit. The grid — typically a central moon-tile board — is your only constraint. Small 1-tile sigils slip into gaps; large 6–8 tile sigils demand planning several turns ahead.

Advanced players treat the board like inventory management: clearing space, repositioning sigils, and sequencing placements to maximize tiles played per turn.

• Adjacency: Many sigils grant bonuses when placed next to specific types (attack, shield, rune-bearing tiles).
• Overlap: Some effects trigger when sigil tiles stack or share coordinates with existing placements.
• Runes of Power: Inscribed during upgrades, runes add persistent keywords and trigger effects based on position relative to other tiles.
• Persistent Effects: Sigils left on the board between turns continue generating value — damage over time, draw triggers, or defensive auras.

Enemies don't just deal damage — they occupy grid space. Some place hostile tiles that debuff adjacent sigils, block placement zones, or force you to work around obstacles. Multi-enemy fights (1–4 foes) compound this pressure, making area control as important as raw damage output.

• Exhaust: Removed from deck after playing (common on powerful one-shot sigils).
• Persistent: Remains on board across turns, continuing its effect.
• Ashen: Tark'thul-specific mechanic — cards that interact with burn/status zones.
• Forbidden: Special high-risk cards unlocked through progression, often with powerful but dangerous effects.

At upgrade nodes, you can remove individual tiles from a sigil's shape. A bulky 8-tile attack becomes a sleek 5-tile piece that fits anywhere. This is one of the most impactful decisions in the game — prioritize reshaping your core damage or defense sigils early.

Tip: Reshape opportunities are limited per run. Use them on sigils you expect to play repeatedly, not one-off utility cards.

Runes add keywords and positional triggers to sigils. Attack Runes, Shield Runes, and character-specific runes stack synergistically when placed adjacent to complementary tiles. Aladara excels at rune-heavy builds; Feldryn spreads runes across persistent effect chains.

Certain events and upgrades let you swap shapes between two sigils. A compact shield paired with an oversized attack can be reshuffled to optimize both. Watch for these opportunities during events and rest sites.

Unlike traditional deckbuilders where thinning is paramount, Moonsigil Atlas rewards both streamlined engines and wide decks with draw loops. A 40-card deck with infinite draw can play 15+ sigils per turn if shapes fit. Conversely, a 15-card focused deck guarantees your reshaped power cards every cycle.

Mastery persists across runs. Every attempt — win or lose — grants Mastery experience for your current character. Leveling Mastery unlocks:

• Additional playable characters (Aladara, then Tark'thul)
• Alternate starting decks for each character
• New cards added to the reward pool

Expect 3–5 runs before unlocking your second character. Don't be discouraged by early losses — Mastery progress is guaranteed.

Artifacts provide passive run-wide bonuses — extra draw, bonus damage on adjacency, starting resources, and more. They appear in shops, events, and post-combat rewards. Some artifacts are moon-linked, changing appearance and effectiveness based on the real-world lunar cycle. Checking the current moon phase before a run can influence which artifacts appear and how strong they are.

• Act I: Introduction to core mechanics, basic enemies, first upgrade opportunities.
• Act II: Harder elites, more complex events, artifact synergies become critical.
• Act III: Maximum difficulty, Titan encounter at the end, full deck potential tested.

Node types include standard combat, elite combat (better rewards), events (choices with risk/reward), shops (buy/remove/upgrade), and rest sites (heal or upgrade).

Dozens of enemy types populate the three Acts. Common patterns include:

• Space occupiers: Place tiles on your grid, reducing available area.
• Debuffers: Apply status effects to adjacent sigils or your hand.
• Multi-attackers: Hit multiple times per turn, rewarding efficient shield placement.
• Summoners: Spawn additional enemies mid-fight, escalating board pressure.

Each Act culminates in a Titan boss — not a simple health bar sponge, but a fight that reshapes the rules of combat:

• Board alteration: Titans can shift, shrink, or add zones to the grid mid-fight.
• Hostile zones: Areas that damage or debuff sigils placed within them.
• Unique win conditions: Some Titan fights require destroying specific structures, surviving phases, or meeting spatial objectives beyond "reduce HP to zero."

Arriving at a Titan with a strong deck is only half the battle. Adaptability — repositioning, clearing hostile tiles, and rebuilding board state — determines victory.

Stack draw-on-play and draw-on-adjacency effects. With no energy cap, each drawn sigil is another placement opportunity. Works best with compact (1–3 tile) sigils reshaped for easy fitting. Feldryn's draw synergies make this archetype natural.

Invest all upgrade resources into one sigil — reshape it small, inscribe multiple runes, duplicate it through events. A single overpowered tile played every turn can solo encounters. High risk if the card is debuffed or removed.

Fill the grid with persistent shield and rune tiles, creating an impenetrable spatial fortress. Excellent against multi-attack enemies and Titans with hostile zones. Slower but extremely safe.

Aladara's specialty — inscribe Attack and Shield Runes across multiple sigils, then place them adjacently for cascading triggers. Requires planning but produces explosive combo turns.

Apply burn stacks and status effects through Ashen card interactions. Tark'thul rewards aggressive risk-taking — overlapping burn zones and playing through damaged board states.

• Commit to a strategy by Act II — spreading upgrades evenly rarely outscales focused investment.
• Keep at least 2–3 compact utility sigils for tight board situations.
• Don't skip shops — artifact purchases often define run viability.
• Test reshaped shapes in early fights before committing at major upgrade nodes.