
Calcium Chaos is a casual Twin-Stick Roguelite that takes you on a journey by train to confront the necromancer and her skeleton army. Get ready to explore a world filled with crazy weapon combinations and unexpected allies as you embark on an epic quest to save the world!
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 Jul 21 → 0/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 25 chart moves that followed a price cut of more than 20% went a median of 10 places towards #1, and the 2,413 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
Skeletons are invading, and your only defense is a toaster and a chicken! Embark on a whimsical adventure through a land plagued by pesky skeletons! Uncover weird and wacky weapon synergies to fight back against the bony baddies. Along the way, you'll gather a rag-tag group of heroes who will aid you on your mission- will you have the guts to stop the necromancer's plans and save the world?

Discover an arsenal of ONE MILLION different weapon combinations, from explosive toast to homing robot chickens, and customize your loadout to suit your playstyle as you wreak havoc on your enemies.

Recruit up to four friends to join your quest to defeat the necromancer, or measure yourself by playing alone.

Transform your train into a formidable base of operations for the friends you meet along the way, buy upgrades, decorate your train, and prepare your next mission!
Dive into procedurally generated levels filled with challenges!
Test your skills and adaptability as you strive to overcome the ever-growing threats that await you.
Genres
Engagement
Reviews
Themes across 40 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
Boring, basic "roguelike", with paid reviews clogging up the review section. I'm making this review because the steam page says all of the 50 reviews are 100% positive while you have people giving it thumbs up with such amazing reviews as "So cool" or "It's good" or "It's pretty OK" They claim there's "millions of weapons" but in reality they're counting the same weapons like hundreds of times, because you combine base weapons to create a "new weapon" but the order doesn't matter. So Cards + Fireworks + Nails is the same as Nails + Fireworks + Cards which is the same as Cards + nails + fireworks which is the same as Nails + cards + fireworks, and so on. But they counted those all as separate "Weapon combos". In other words, there's actually about...ten real weapons and half of them are TERRIBLE. The "Zombies ate my neighbors" weapons opened the possibility for really interesting, really unique playstyles. Instead we have "Machine gun / shotgun / SMG / Fire damage / Explosives" as if we're using normal guns but with png's of eggs instead of bullets. And the rogue items are the same old same old trash filler items that you see in every basic, talentless roguelike. + % [Insert basic stat such as attack, defense, attack speed, range, movespeed or health.] That's it. There's nothing that is really just head-turning or interesting. You just end up with the same build every run because there's no real variety, even as you unlock more and more it's only adding really basic stuff. Like, oh my goooosh, chain lightning? you shouldn't have. Oh you can set enemies on FIIIIRE? HOW ORIGINAL. Save your money. $10 is way too much. $2.50 is too much. FREE is too much. Your time is worth more than this game's asking price, even if there IS no price. I promise. Just go play a good roguelike, there's so many.
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Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English**languages with full audio support
Hours played at review time, across 40 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
A fun roguelite with a crazy story and where you combine different weapons into new weapons. It has 2 hardcore achievements, for completing the game on hardcore without losing a life. You can save scum to make this not missable. [b]Approximate amount of time to 100%:[/b] 6h+, depending on skill level and save scumming or not [b]Estimated achievement difficulty:[/b] 7/10 [b]Minimum number of playthroughs needed:[/b] 2 [b]Is there a good guide available:[/b] No, but you don't need a guide [b]Multiplayer achievements:[/b] No [b]Missable achievements:[/b] Yes, there is an achievement to finish the game on hardcore mode without losing a life [b]Grinding Achievements:[/b] No [b]DLC-Only achievements:[/b] No [b]Speedrun achievements:[/b] No [b]Time-gated achievements:[/b] No [b]RNG-achievements:[/b] No [b]Does difficulty affect achievements:[/b] Yes, there are 2 achievements for hardcore mode [b]Unobtainable/glitched achievements:[/b] At this moment 2 achievements are bugged (writing this on 15 November 2024), but they should be fixed in the next patch Calcium Chaos: Derailed is a fun roguelite game in which you are on a quest to save the world from the necromancer and her undead army. In each level you will complete fighting sections with visiting shops, recruiting new people for your train and more like that. I had a lot of fun while playing through the game, which took me around 3 a 4 hours. However, it started to feel a bit the same around the end. There are a few weapons and yes with upgrades they change a little but not enough to make them feel different. I had 3 preferred weapons from like the 7 or 8 main weapons and then it was just combining those with others to change their effect a little. This is totally fine but mentioning on the Steam store page how many combos there are possible might give the wrong impression and higher the expectations. What I love about the game was the humor and the crazy boss fights. They felt different from each other and they did crazy things. Also the artwork and the passive upgrades were very nice! I also love that the game isn't too long. It doesn't overstay its welcome! To unlock all the achievements you have to play 2 times through the game. First on any difficulty you like, and after you beat the game the hardcore mode becomes available. This is directly why the game is so challenging, there is an achievement to beat the game on hardcore mode without losing a life. You can backup your save from time to time to make this a bit easier, but it still will be such a challenge. Especially the last boss fight. The other achievements are for most of the things you'll do while completing the game, leveling up your weapon to the max level, having 10 passives at the same time, find the other recruitments, beat the bosses. There are hidden rooms, an an achievement to find 1 and to find 6 of them. They are not in the second area but in the other areas you can find secret rooms that will not be visible on your map. And last but not least, there is an achievement for buying every item from Sam on your train. I missed that in his wagon he has a shop as well, which unlocks new passives that can spawn in the levels. Highly recommend checking his shop out early on! I give Calcium Chaos: Derailed 3 out of 5 stars. [code]If you like this review, feel free to check out my website: [url=https://www.missitheachievementhuntress.com/]Missi the Achievement Huntress: Reviews & guides[/url][/code]
A very enjoyable roguelite arcade shooter, reminiscent of Binding of Isaac or Cult of the Lamb. The big draw of the game is the mechanic of weapon combinations, which allows for a truly staggering amount of varied playstyles and possibilities. There's also a heavy emphasis on couch co-op, which suits the game really well, though the single player campaign is very enjoyable on its own. I also want to shout out the art style, which is both cute and funny at the same time; there's something reminiscent of the classic Newgrounds games about it, which is absolutely a positive in my book. Very refreshing to see a game that doesn't default to faux-retro pixel art. For players who have played similar games before, I would probably encourage playing on the hard difficulty, as the middle-of-the-road one might not offer much of a challenge. For newbies wanting to broach the genre of twin stick shooters, Calcium Chaos is a great offering to get you started, without having to suffer the constant setbacks of Binding of Isaac, or the tedious micro-management of Cult of the Lamb. Highly recommended for the price.
This game is really fun to play with friends! The different weapon combinations gave me unique experiences each time I played. Also the music and cartoon style art are lovely
Twin-shooter that makes progress easy with strong weapons and useful gadgets. The game begins with Robin crashing a train into Amir's house. These two are the playable characters, and you can select which one to play on the train, although other characters will appear later. It does not matter because everyone plays the same way. The train is also where you choose levels. They must be played in order, although you can always replay them. The gameplay revolves around the twin-shooter mechanic. Aside from movement, you can dash through holes and evade opponent projectiles. You do not have a personal weapon because you are given two random weapons every time you start a stage. The bad news is that if you wish to use another weapon, you must access your inventory and switch manually; the good news is that weapons can be combined. This can be done in workshops, and the whole mechanic is similar to upgrading. The first weapon you choose will always be the primary, while the second will be sacrificed to upgrade it. There is no cost for doing this, and you can easily disassemble them if you are dissatisfied with the results. A weapon can be upgraded multiple times, although this is earned gradually as you progress through the game. The fun part is that you might get different results depending on the sacrificed weapon, However, the choice of weaponry is limited, so you will most likely choose one that works and stick with a combination from start to finish. Alslo, the sixth upgrade is broken and doesn't unlock even when you grab the toolbox. The game takes through four worlds, each with five stages. You start in the suburbs, continue on to the jungle, and so on. Main enemy are skeletons in various shapes and forms, and some new ones are introduced in each world. Stages are made up of arenas that close off their exits and spawn enemies as you enter. After defeating everyone, exits become available, and you can choose where to go next. There is a map to help you navigate the various exits, although each stage only comprises about 7 rooms. It’s all very straightforward with an occasional bonus room with a challenging fight or free chests. The reward for clearing a room is a box or chest containing shards. Some of these shards can also be obtained by destroying destructible assets. Sometimes you will locate a more important-looking chest that also contains an item. These provide a little advantage, such as faster speed and increased critical hits, and you can hold multiples of the same type. The goal of each level is to find a signpost that will allow you to progress to the next stage. Like similar roguelite games, you can sometimes choose between two paths They feature icons that show what you may expect, such as bones representing basic stages with enemies, a fork where you can obtain free things, and special areas where you can discover specific weapons, such as a feather in a chicken coop. Aside from stuff and weapons, you can find abilities if you go to the right place on the map. These are not that useful because you need to fill up the bar before you can use it. This is done by killing enemies. The primary goal is to reach the exclamation point at the end, when you must defeat a bunch of enemies or a boss to receive a cool reward. For example, the first level provides you a new train cart, while the second introduces a new crewmember who sells new items. After completing the entire stage, all objects obtained will be crushed and transformed into milk cartons. These are used in vending machine in the train to purchase useful gadgets such as marker that shows the signpost or portable workshops. Once bought, they will always be active. One bug might cause some frustration. Sometimes, the stage's objective doesn't show up, so you won't be able to finish the stage or continue. All you can do is return to the train, but in this case you lose all rewards. There's also some strange gadget that's supposed to show something, but I never noticed anything. It must be one of rare broken features in the game.
---{Graphics}--- ☐ You forget what reality is ☑ Beautiful ☐ Good ☐ Decent ☐ Bad ☐ Don‘t look too long at it ☐ MS-DOS ---{Gameplay}--- ☐ Very good ☑ Good ☐ It‘s just gameplay ☐ Mehh ☐ Watch paint dry instead ☐ Just don't ---{Audio}--- ☐ Eargasm ☑ Very good ☐ Good ☐ Not too bad ☐ Bad ☐ I'm now deaf ---{Audience}--- ☐ Kids ☐ Teens ☐ Adults ☑ All ---{PC Requirements}--- ☐ Check if you can run paint ☐ Potato ☑ Decent ☐ Fast ☐ Rich boi ☐ Ask NASA if they have a spare computer ---{Difficulity}--- ☐ Just press 'W' ☐ Easy ☑ Significant brain usage ☑ Easy to learn / Hard to master ☐ Difficult ☐ Dark Souls ---{Grind}--- ☐ Nothing to grind ☐ Only if you care about leaderboards/ranks ☑ Isn't necessary to progress ☐ Average grind level ☐ Too much grind ☐ You‘ll need a second life for grinding ---{Story}--- ☐ No Story ☐ Some lore ☐ Average ☑ Good ☐ Lovely ☐ It‘ll replace your life ---{Game Time}--- ☐ Long enough for a cup of coffee ☐ Short ☑ Average ☐ Long ☐ To infinity and beyond ---{Price}--- ☐ It’s free! ☑ Worth the price ☐ If it's on sale ☐ If you have some spare money left ☐ Not recommended ☐ You could also just burn your money ---{Bugs}--- ☑ Never heard of ☐ Minor bugs ☐ Can get annoying ☐ ARK: Survival Evolved ☐ Cyberpunk 2077 ---{?/10}--- ☐1 ☐2 ☐3 ☐4 ☐5 ☐6 ☐7 ☐8 ☑9 ☐10
A casual, fun, and slightly goofy game where you shoot your way through a skeleton invasion with weapons you create by stringing together items like soap bubbles, toasters, and explosive chicken eggs.
10/10. One old weird trick with regular household items - The military hates him.
I've always wanted to combine chicken eggs, an electronic toaster and a set of playing cards and create a doomsday device. This game is pretty fun, I don't normally like roguelites but this is definitely the exception
Super fun & charming game. Great idea with the weird combination weapons.
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Players by region
Where this game's players are, estimated from review languages.
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