
A survivors-like deckbuilder with mutating spells and five schools of dark magic. Build devastating combos, battle through ten cursed levels, and spend earned points on booster packs. Survive the isometric bullet hell solo or in local co-op.
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 0/day in the week to Sep 3 → 0.14/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 26 chart moves that followed a price cut of more than 20% went a median of 7 places towards #1, and the 2,400 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
Codex Mortis is an isometric horde-survivor bullet hell whose roguelite loop runs on a spell deckbuilder. You play a necromancer. Before every mission you assemble a deck from the spells you own, then carry it into a battlefield filled with the undead, alone or with a friend in a local co-op. You spend the points you earn during a run on booster packs, each pack adds new spells to your collection, and those spells open builds you could not have assembled before.
Plan before you slaughter, because once the mission starts you fight with what you brought. Before every mission you assemble your loadout from the spells you own, and that loadout is your deck. A deck weighted toward Summoning wins the field by crowding it, with skeletons soaking the horde while you cast. A deck weighted toward Blood Magic hits harder and sacrifices your life to do it.
The points you earn on a run buy booster packs, and every pack adds spells to your collection, so your next deck comes out of a wider pool.
Mutations sit on top of the skills you carry and change the way they work. A mutation riding your bone spear sends it out in a pattern you have to learn again, and one on a summon calls up another archetype of undead. Others reshape the ground an area spell covers or give an aura a character of its own, so a spell you have cast a hundred times comes out of your hands changed.
Every spell in your collection belongs to one of the five schools of dark magic.
Necromancy: bone spears, corpse explosions and skeletal prisons.
Summoning: raise undead armies and bone golems.
Blood Magic: sacrifice life for power.
Soul Magic: harvest essence, phase through enemies.
Curses: break enemy will, spread terror and confusion.
Find perfect builds for ten levels available in Early Access: Forgotten Graveyard, Sand Tomb, Cursed Catacombs, Bone Cathedral, Void Sanctum, Soul Nexus, The Throne Room, North Pole, The Overgrown Grave, Chapel of Perpetual Bloom
Mix active spells across magic schools for unique combinations
Command Heroes with their own abilities (or play co-op with friends!)
Equip Artifacts that grant powerful bonuses
Deep progression - upgrade damage, cooldowns, health, speed, and more
Open card packs for new spells
Procedurally generated worlds - every run is different
Engagement
Reviews
Themes across 45 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
I bit the bullet to write this review, I went into this game with very low expectations considering this game admits to being "100% AI driven development". It is as bad as the label states. This game is unoriginal AI slop masquerading as a real game. Don't waste your money on this, instead you should buy a fast food burger. Because at least you'd get your money's worth and be more fulfilled.
I've kept an open mind trying this game. AI will do your story, graphics, sound, music and the coding glue to hold it together, it won't design you a great game full of soul and charm.
Media

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Price dynamics, follower growth, revenue and sales trajectories with interactive tooltips
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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English, French, Italian, German, Spanish - Spain, Bulgarian, Simplified Chinese, Czech, Danish, Finnish, Greek, Spanish - Latin America +16 more
Hours played at review time, across 45 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
this is not a vampire-surviver like games, but a action puzzle game. only LV1 is a farming&guide, other level all have special interesting design, that's a good idea, but the experience is bad. LV2 is Pac-man like, very nice, not too much challenge. LV3 is a puzzle-solve level, the graphic is weird, very hard to understand which is wall or entrance, too many mobs, but still not very hard. LV4 is a ♥♥♥♥♥♥♥ disaster, a invincible boss is chasing you, u have to kill 3 mini boss to fight him. even the easiest mode, the boss touch you will got 25000 dmg means a instant kill. u had to boost u speed to avoid him. but if you speed too fast, the boss will teleport with almost no notice, or have a inverse run. so ♥♥♥♥♥♥♥ bad experience, even i unlock all the character and skills still can't beat in 4 hours. i am tired of play the noob game, all the builds are totally got a joke in the 1 life game, so i quit.
This game was supposed to be fun, it was supposed to fill the itch for another nice game like Vampire Survivors but... This is pure disaster. At least I couldn't feel any pleasure playing it - 88 minutes of playing it just gave me anger and feeling that someone is taking my money for free... Cause this is not worth it even... I really tried to find some sense but no only skills are not making really difference... System of these skills is there for some reason but neither skills nor synergies are helping. This should be free to play rather than product even in early access... Refunded without any hesitation.
cheaper than a gallon of gas
Better than Starfield
The first map is the best, but you can only play it on three difficulty levels. You have to grind through a bunch of dull missions to unlock the other difficulties. Let’s not force the other maps. On top of that, they have even more cheap “go right, then go left for several hundred meters” filler. That does not give you a better understanding of the game, it just forces you to do content you cannot skip if you want higher difficulty for the earlier modes. I like the first map, and the game is basically saying: yeah, if you want to keep playing that one, then do not play it on a higher difficulty, instead go play something else that you might not even like... weird
I had such a hard time with the Bone Cathedral, but after a lot of practice I finally got it. No other horde survival game made success feel this good.
I really enjoy the game and the updates at the moment are flying in which is great, it would be cool if we could see something other than the same 6 synergies on every single spell ever though, it's always burn, hem, weaken, confuse etc. nothing unique, imagine if life drain targets fired blood lances or something
I have no idea as to what I'm collecting most of the time. But I bloody love it lol. The synergy system is cool, I'm glad they added it to the game. It may be in early access, but it has a good amount of content it would appear. I've not played a ton yet. But the price is fantastic, and it'll be fun to see how the game evolves. Everything is absolute chaos, but in a good way. If you enjoy the Survivor-Like genre, you'll most likely enjoy this game.
Players by region
Where this game's players are, estimated from review languages.
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