I finished Cobalt Core months and months ago, and Fritz has been bothering me to review is ever since. So! To buy myself some peace and quiet, let’s talk about this sci-fi roguelike deckbuilder.
This game was made for me. I love roguelikes, especially roguelike deckbuilders—I’ve 100% completed Hades and Slay the Spire, and I’ve sunk countless hours into trying to do the same in Monster Train (not yet, but one day). I’m a sucker for crew-on-a spaceship games. And Crypt of the Necrodancer is one of my favorite games ever (published by Brace Yourself Games, the publisher of Cobalt Core).

So on paper, a spaceship deckbuilder roguelike that’s like if FTL, Hades, and Slay the Spire had a baby published by the publisher of Crypt of the Necrodancer would be the perfect game for me… And it is. Cobalt Core is fantastic.
The Mechanics
Okay yeah I guess I have to explain the mechanics.
You have a spaceship. It points to the top of the screen.
There’s an opposing spaceship. It points down towards you. Fight!
You and the opposing spaceship take turns. On your turn you play the hand of cards you drew from your deck, doing things like firing your blasters, activating your drone bays, shielding your ship, or moving your ship left and right. Your ships are aligned in vertical lanes, so that each component of your ship is lined up with a component on the opponent’s ship (or empty space). You’ll move your ship around to try to make sure that your blasters line up with the opponent’s vulnerable cockpit, and that their blasters line up with empty space.

The rest is pretty straightforward deckbuilder roguelike. Try to kill the opposing ship without taking too much damage (ideally none). Spend money to upgrade your ship with “relics” (to borrow the term from Slay The Spire) heal yourself, and add cards to your deck. Choose your route through each system between combat, hard combats, shops, encounters, etc. Each system ends with a miniboss, and you’re trying to beat the final boss.

And there are a reasonable amount of pre-run options. You can choose different ships with different specialties and configurations. Also each card in the game belongs to one of several suits, one for each of the crew members. At the start of the run you choose which 3 crew members you’d like to play with this time, and that determines what cards you can see. Each crew member has their own focal mechanics, like the one who’s good at drones, or the one who has strong attacks that overheat your ship.
The Story
Another place Cobalt Core really shines is its story. For a while, it seemed like roguelikes and story didn’t mix, and most deckbuilder roguelikes didn’t even try to have a story.
(To some extent, I wonder how much “writing story” and “designing card game mechanics” are skill sets that don’t overlap.)
When they tried, the narrative would be very very lightly implied with environmental storytelling. Seriously, why are we slaying this spire? Something something, pact with heaven, so now I’m on a monster train.
Then Hades happened, and suddenly every roguelike is trying to be character- and story-driven. It’s really hard to land that, but Cobalt Core pulls it off. The characters are cute, and I wanted to learn more about them. And perhaps even more challenging: the dialogue is good and funny. I’m not going to write anything more in order to avoid spoilers. Just go play it.
The one iffy story bit is how the story is rolled out. Whenever you win a run, you can unlock the next cutscene from one of the crew members you chose to play with. When you unlock all the cutscenes, there’s a final final boss battle and you can win.
I didn’t mind this, and I was interested to unlock all the custscenes. But the cutscenes got in the way of the “one more run” feeling that can make roguelikes so great. The most clever roguelikes even elide one run into the next so that you just keep trying. And Cobalt Core’s cutscenes do the opposite, interrupting my play experience and providing a point to put down the game. Even though I liked the scenes, I often found myself pausing the game and walking away without watching them.
I don’t really know why Hades is able to offer story in the hub without disrupting that flow. Maybe it’s because each of the dialogue updates you get from characters are so short, and there are always only a few. But I’d have liked to see more of that in Cobalt Core.
The Problem
In my opinion Cobalt Core has one big problem: there just isn’t enough of it. Is it worth the $20 price tag? Absolutely. In fact, go buy it now on Steam or Switch.
But I’m used to roguelikes really letting me test my mettle by giving me tons of difficulty ratchets and interesting achievements to chase. Cobalt Core really doesn’t have these. It has a few ships and 4 or so difficulty increases to unlock, but there’s no incentive to even play on those other ships. I had to invent my own personal goal of winning on highest difficulty with each of the ships, and even that wasn’t too hard.

So in short, go buy this game, play it, and then the studio can invest that money in adding to the game. I don’t even want much; just a list of arbitrary challenges/achievements, and maybe 15 more difficulty ratchets. Add those, and I think Cobalt Core is perfect.