Aeterna Noctis

Somewhere between the pixel-perfect masochism of Celeste and the interconnected grandeur of Hollow Knight sits Aeterna Noctis, a hand-drawn 2D Metroidvania from Spanish studio Aeternum Game Studios. It is not a game that meets you halfway. It grabs you by the collar and asks whether you’re serious.

The premise leans mythic. You play the King of Darkness, stripped of his powers and locked into an eternal war against the Queen of Light—a conflict engineered by a creator-god named Chaos who, frankly, seems bored. That framing does real work. It justifies a world built around 16 interconnected, non-linear regions and a power-reacquisition arc that gives the whole sprawling map a spine.

Market positioning matters here, and Aeternum knew exactly what it was building. This is a genre piece aimed squarely at hardcore Metroidvania and precision-platforming enthusiasts—the people who finished Hollow Knight’s Path of Pain and asked for seconds. The studio is not chasing the mainstream.

The reception tells a specific story: this is a game people either adore or bounce off hard, with little middle ground. The praise clusters around responsive controls, striking traditional animation, deep customization, and boss fights that feel like final exams. The criticism is just as consistent: punishing difficulty, occasionally cruel platforming, a map so large it can feel padded, and performance that reportedly wobbles when the screen gets busy.

Aeternum’s smartest move was recognizing its own extremity. Rather than pretend everyone should suffer equally, the studio split the experience into two modes. That decision, more than any single mechanic, defines who this game is actually for—and it’s a decision most of its peers were too proud to make.

• Two-Mode Design Philosophy: Noctis Mode preserves the pure, unforgiving precision-platforming gauntlet. Aeterna Mode dials back the brutality to foreground exploration and combat. This isn’t a difficulty slider bolted on late—it’s a genuine fork in intent.
• Teleportation Arrows: The signature traversal mechanic. You fire an arrow, then warp to it mid-air, chaining aim-and-blink maneuvers to cross lethal hazards. When it clicks, it’s exhilarating. When it doesn’t, the death counter climbs fast.
• Deep Customization: An expansive skill tree plus a customizable gem system lets you retune the King’s active abilities, combat style, and passive buffs. Build variety here is real, not cosmetic.
• 16 Interconnected Regions: A massive, non-linear world stitched together with the backtracking, gating, and secret-hunting the genre demands.
• Hand-Drawn Animation & Orchestral Score: Traditional 2D animation and a full orchestral soundtrack give the world genuine presence and weight.

The Gameplay Loop

Aeterna Noctis runs on the classic Metroidvania engine: explore, hit a wall, find the power that breaks that wall, double back, unlock more world. Aeternum executes this competently. The 16 regions loop back on each other with the satisfying click of a well-built lock, and regaining the King’s lost abilities gives each new tool a narrative reason to exist rather than feeling like a designer handing you a key.

But the loop is not what people remember. What they remember is the platforming.

This game treats movement as the primary combat system. The teleportation arrows are the centerpiece, and they are the closest thing here to a genuine genre innovation. Firing a projectile and then physically becoming that projectile mid-flight—threading it between spike walls, over instant-death pits, through timed gaps—demands a kind of spatial thinking most Metroidvanias never ask for. It’s Portal logic grafted onto Super Meat Boy execution. The skill ceiling is enormous, and the design is built to produce hard-won, addictive triumphs.

The problem is the floor. There is very little of it. Aeterna Noctis has almost no tolerance for the learning curve it demands. The precision required in Noctis Mode is frequently punitive in ways that cross from “challenging” into “adversarial.” Some sequences feel less designed to test you than to break you, and the line between the two is where a chunk of players will quietly put the game down for good.

The Mode Split, Reconsidered

This is why Aeterna Mode is arguably the most important design decision in the whole package. By separating the precision-platforming purists from the players who came for exploration, lore, and combat, Aeternum acknowledges a truth the genre often resists: not everyone wants their reflexes audited. Aeterna Mode isn’t a compromise so much as a second, more humane version of the same world.

Combat and Builds

Combat is designed to be responsive and satisfying, if not quite as revolutionary as the traversal. The King’s controls are built for crispness—inputs landing exactly when pressed is non-negotiable for a game this demanding, and the design reflects that priority. The skill tree and gem system are where combat gains depth. You can genuinely reshape your playstyle: lean aggressive, tune passives, restructure your active powers. Serious players will find real optimization here.

The boss fights are the payoff. They’re large, choreographed, multi-phase spectacles that function as skill checks for everything the preceding region taught you. These encounters are where the art, music, and mechanics converge into something memorable.

Where the Ambition Cracks

Scale is Aeterna Noctis’s greatest asset and its most persistent liability. Sixteen regions is a lot of world, and not all of it justifies its own square footage. The map’s sheer size can tip into padding—stretches of traversal that feel like distance for distance’s sake rather than meaningful design. A tighter edit would have concentrated the brilliance; here, that brilliance is occasionally diluted by acreage.

The art is the easiest thing to love. Hand-drawn traditional animation gives every character and environment a fluidity that pre-rendered or heavily-tweened sprites can’t match. The King moves like something illustrated frame by frame, because he essentially is. The world’s stylization is striking—gothic, moody, and coherent from region to region. Paired with a sweeping orchestral score, the presentation punches well above the studio’s indie weight class.

Performance is the asterisk. Reports flag occasional performance issues, and in a game where a single dropped frame during a teleport-arrow sequence can mean death, that’s not a cosmetic complaint—it’s a mechanical one. When the screen fills with hazards and effects, stability matters more than in almost any other genre. Any hitch here can cost a run a player earned.

On Steam, this is arguably the definitive way to play. A controller is strongly recommended—the analog-stick precision and low input latency of a good gamepad matter enormously for the arrow-warp mechanics—and PC hardware offers the best odds of smoothing out the performance concerns, provided the rig has headroom.

On Nintendo Switch, the trade-offs sharpen. The portability is a genuine draw; a game this dense rewards the pick-up-and-suffer rhythm of handheld play. But the Switch’s more limited hardware is exactly where those reported performance wobbles are most likely to bite, and in a title this unforgiving, that’s a real consideration—not a footnote. We recommend Steam for anyone with both options; the Switch version remains an option for handheld devotees, with eyes open about the risk.

Aeterna Noctis is the work of a studio with more talent and ambition than restraint, and that’s only partly a compliment. The teleport-arrow mechanic is a real contribution to a crowded genre, the animation is beautiful, and the two-mode structure shows a maturity most punishing games lack. But it stumbles on scale and stability—the map overstays its welcome, the difficulty too often tips from demanding into adversarial, and the reported performance hiccups are more dangerous here than they’d be anywhere else. This is not a game for everyone, and Aeternum never pretended otherwise. For the hardcore faithful willing to bleed for it, there’s a satisfying mountain here—but most players should look elsewhere first.