Player Decision Brief

CODEX MORTIS

Consider CODEX MORTIS if you enjoy horde-survival action with planned spell decks, mutations, and room to experiment with builds. Solo play, local co-op, and online groups are all supported.

$2.79 Windows, Linux Action Sep 24, 2026 70% Positive (67 reviews)

$2.79 View on Steam

Is CODEX MORTIS Right For You?

Best For

✓ Fans of survivors-like bullet-hell action
✓ Players who enjoy planning spell loadouts and testing synergies
✓ Groups looking for local or online co-op
✓ Players who like collection-based progression between runs

Think Twice If

! Players looking for a story-focused RPG
! Those who prefer uncluttered, easy-to-read action
! Players who dislike unlocking spells and expanding a collection

Before You Buy CODEX MORTIS

Check the Steam system requirements for your PC; Linux players should also review compatibility details.

Confirm that the supported interface and subtitle languages meet your needs; full audio is not listed for them.

Expect to assemble a spell deck before missions and expand your collection with points earned during runs.

Check Steam for the current price and any sale terms before buying.

CODEX MORTIS Fit Matrix

Coop

High

Solo

High

Grind

Medium

Story

Low

Performance risk

Low

Beginner friendly

Medium

What Players Say About CODEX MORTIS

Recurring player themes that may help you decide whether this game fits your taste.

Players Often Praise

• Players who enjoy the game often praise experimenting with spell synergies and building stronger loadouts.
• Some find the horde-survival action and progression satisfying and replayable.

Common Complaints

• Some players find the menus and deck or loadout setup hard to understand.
• Others criticize repetitive missions, uneven pacing, or action that is difficult to read.

Mixed Reactions

• Difficulty divides players: some enjoy a challenge, while others find parts too easy or frustrating.
• Reactions to AI involvement are sharply divided.
• Build experimentation appeals to some players, while others find the collection and deck presentation confusing.

Player Fit

• A better fit for players who enjoy build experimentation amid dense horde action than for those who prioritize clear, uncluttered combat.

CODEX MORTIS Key Features

Isometric survivors-like combat

CODEX MORTIS presents its horde-survival bullet hell from an isometric perspective, with you fighting the undead as a necromancer.

Pre-mission spell decks

In CODEX MORTIS, you assemble a deck from spells you own before each mission. Points earned during runs can buy booster packs that add spells to your collection.

Ten schools and 200 spells

Spells belong to one of ten schools of dark magic, with 200 spells in the collection and schools designed to combine with one another.

Mutating spells

Mutations change how carried skills work, altering things such as a spell's attack pattern, an area spell's coverage, or the kind of undead a summon calls.

31 playable heroes

The roster includes 31 heroes, many built around two or three schools of magic, offering different combinations to build around.

Solo and co-op options

Play alone, in local shared-screen co-op, or online with up to four players. Steam also lists full controller support.

CODEX MORTIS Screenshots

CODEX MORTIS FAQ

What kind of game is CODEX MORTIS?

It combines isometric horde-survival bullet-hell combat with roguelite progression and spell deckbuilding. You choose a deck before each mission, then fight waves of undead.

Can I play CODEX MORTIS solo or with others?

Yes. You can play solo, in local co-op, or online with up to four players.

Which platforms and controls does it support?

The game is listed for Windows and Linux, and Steam lists full controller support. Check the Steam page for system requirements and Linux compatibility details for your setup.

Which languages are supported?

Interface and subtitles are available in English, French, Italian, German, Spanish (Spain and Latin America), Bulgarian, Simplified Chinese, Czech, Danish, Finnish, and Greek. The listed language support covers interface and subtitles rather than full audio.

What do players say about CODEX MORTIS?

Reactions are mixed. Positive comments highlight build synergies and satisfying horde-survival runs; criticisms include confusing loadout menus, hard-to-read action, repetition, and uneven polish. Opinions about AI involvement are also divided.