Ruyn HD
Flump Studios · 2025 · Boomer Shooter, FPS, Action, Level Editor, Shooter
Screenshots
About Ruyn HD
Blast through short, intense levels at breakneck speed in this minimalist boomer shooter remake, chaining combos and style kills to rack up high scores with pure, simple gunplay mechanics. Built in Unreal Engine 5 with the original Ruyn Classic included, full level editors for both versions, and 100% free with no ads or microtransactions.
The levels are short, intense, and built for momentum—just you, some weapons, and a ton of enemies to blast through. The focus is on pure, simple shooter mechanics: fast movement and nonstop action.The original Ruyn Classic is included, and the level editors work across both versions, so you can build once and play in either style.
Ruyn HD is 100% free — no ads, no microtransactions, no DRM.The original Ruyn Classic, the 2D/3D level editors, and the launcher are all open source and public domain. The HD version's Unreal Engine code is not open source due to engine licensing restrictions, but everything else is yours to modify, share, or build on.
How do I play it?The basic goal is simple: eliminate all enemies and reach the exit.
If you're chasing a high score, it’s all about speed, variety, and combo flow.Each time you kill an enemy, a combo bar appears at the top of the screen—it drains quickly. Kill another enemy or collect a gem before it runs out to keep your multiplier alive. The longer you maintain it, the higher your score climbs.But there’s more: the game rewards creative kills. Use different weapons or methods to earn style bonuses. Repeating the same kill type will reduce the bonus—so keep it fresh if you want to score big.There’s also a bonus for finishing the level quickly, so don’t hang around too long.
Note: Ammo is shared over multiple weapons. When you collect some shells, you have access to the shotgun and double barrel shotgun straight away. This works the same for the plasma which is shared across the plasma rifle and trident.Tip: Use the single-barrel shotgun when you need something that fires fast and the double-barrel shotgun when you need more grunt. This can help when you're trying to keep up a combo.How do I make and share my own levels?You can find detailed tutorials on how to build your levels here on github gists(See Online Manual URL on this page) and in the community hub.
If you have any questions just fire me a message in the community hub.
All in-game music by GTDStudio (aka Palrom), licensed under OGA-BY 3.0.
What Steam players say
Recent verbatim reviews from Steam — separate from playze.io community reviews below.
Players appreciate Ruyn as a fun, challenging boomer shooter in the vein of classic Doom, though opinions differ significantly between the Classic and HD versions. The HD version is praised for superior music, proper mouse controls, and solid gunplay, while the Classic version is criticized for broken mouse aiming and poor audio. Common complaints include lack of control remapping options, occasional input registration issues, and a visual style where pixelated sprites clash awkwardly with 3D environments, though the game's free nature makes it worth trying for genre fans.
So, apparently, that needs to be precised : Allow players to remap controls in your boomer shooter, Mr. Marrable. Not everyone plays the way you do.2 found this helpful
It's fun and reminds me of the older boomer style shooters, certainly not a walk in the park.
Okay. A little piece of advice. If you´re not hunting for them achievements like me, stay away from the Classic version. I mean it. It´s the worst. The mouse doesn´t work properly and the music is so bad it almost made my ears bleed. It somehow made the 44 minutes it took me to get through it feel like 44 years. The HD version is a different story however, and it was a very pleasant surprise that washed away the disgusting taste the Classic version left in my mouth. The music is awesome, the gunplay is awesome, and best of all.....THE MOUSE WORKS LIKE IT´S SUPPOSED TO!!!!! The only complaint I have about the HD version is that sometimes the input to fire the gun doesn´t register, which did kill me a few times, but I´d take that any day over the horrendous aim of the Classic version. So yeah. Play the HD, stay away from the Classic. Unless you want all the achievements. In that case you have no choice but to play through it.
The demake is kind of fun and charming, the base game leaves much to be desired tho. Floaty mouse aim and the pixel decorations and enemy sprites clash with the 3D maps. It's free so Id say its worth giving a look.
too much pixels xD
Ruyn Ruyn is a short boomer shooter that clearly takes inspiration from Doom. From its weapons to its enemies, the similarities are obvious—though it doesn’t quite reach the same level of quality. Still, if you’re just looking for something quick to play, it’s worth a try.
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