Caelum's Crux
A new card based action adventure RPG game set in the world of Caelum. Embark into a mysterious journey full of secrets and collect powerful cards to solve the riddles of this epic land and battle with other collectors!
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Rip Soulwords from fallen enemies and use them to create cards that should not exist. Fight beside your dog and rewind time in a dark fantasy roguelike deckbuilder, then challenge your father, the Grim Reaper, to bring your girlfriend back from the dead.
Released
March 6, 2026
Price
Platforms
macOS · Linux · Windows
Developer
Publisher
Last sync
October 7, 2026
GRIMSLAIR is a dark fantasy roguelike deckbuilder set in a hand-painted world that changes every run and grows deadlier each night.
Hunt monsters, collect power from their souls, and build a deck strong enough to defeat The Grim Reaper (Your Dad) and bring your girlfriend back from the dead.
Blank Battle Cards let you build new cards from scratch. Soulwords ripped from fallen enemies reshape your cards with new damage, targeting, resource gains, status effects, and dangerous tradeoffs. Cards also level up as you use them, so the deck you start with is never the deck you finish with.
Grim deals enemy cards onto a five-slot chain. Connected cards can unleash multiple attacks and effects in a single turn. Play cards to charge your Chain Breaker, then shatter a connection before the full chain activates.
Every run rearranges its paths, locations, enemies, and rewards. Cross graveyards, forests, caves, deserts, and frozen mountains as the clock races toward nightfall. Choose a safer route or risk deeper territory for greater rewards.
Trade with strange vendors or kill them and take everything. Give souls to Grim for perks or keep them to unlock more Soulwords. When a choice goes wrong, Time Warp cards let you turn back the clock.
Your husky fights with its own cards, abilities, and upgrades. Build its deck, strengthen its attacks, and turn your companion into a lethal part of your strategy. Yes, you can pet your dog!
Every card, character, and piece of game art was hand-painted by the solo developer over nearly 6 years.
Content notice: dark fantasy violence, blood/gore, death, grief, and mild horror.