
This is a calm yet immersive puzzle-centered platformer, well-suited for players who enjoy mechanical interactions and solving puzzles. It allows you to experience the fun of discovering and overcoming challenges without the pressure of combat.
Revenue comes from in-game items and microtransactions, which our price-based model doesn't estimate. The player count below is how many people own it, not what they spent.
About
As you explore, you'll need to observe environmental clues and decide which card to play at the right moment. The design encourages trial, error, and clever sequencing. The experience is enhanced by atmospheric pixel art visuals and subtle jazz-themed soundscapes, immersing you in a world that feels both stylish and mysterious.
There are no enemies, no health bars — just you, your deck, and your mind.
Card-Based Mechanics: Solve puzzles by playing different cards with unique effects.
Tactical Puzzle Solving: Timing and order of card usage matter in every room.
Stylish Presentation: Crisp pixel art with moody lighting and jazz bar aesthetics.
Combat-Free Exploration: No fighting — just puzzles, logic, and experimentation.
Replay Value: Optional time trials and randomized card draws offer varied experiences.
Think of it as a mix between Baba Is You and Slay the Spire, but in a 2D side-scrolling format. You’re not just jumping — you’re managing your deck and applying cards like tools to progress through a carefully constructed puzzle world.
If you enjoy clever mechanics, elegant puzzles, and relaxed, thought-provoking gameplay, this game delivers a refreshing twist on the puzzle platformer genre.
Genres
Stats
Languages: Korean
Reviews
Не плохая игрушка, можно залипнуть.
"SUM" is a very curious entry here on Steam because the sales page is sheer rubbish... it's like the developer asked a chatbot to create a store sales blurb without actually explaining what game it's for. This is NOT a platformer, or anything else that the store blurb describes. Instead, this is a minimalist browser/mobile tier "card matching" game that kind of works like the Pazaak minigame from Star Wars: Knights of the Old Republic, and if you don't know what KOTOR is, then drop what you're doing and guy buy it here on Steam, because while it's old, it's awesome, and without KOTOR there would be no Mass Effect either. Anyway, enough about actually good games, let's talk about this junk. There's no English translation for the game, but that's okay. The language of bad games is universal. While I couldn't find this on the mobile app stores, everything about it looks and feels like it's a mobile app designed for mobile phones... for PC gaming enthusiasts, it's not going to give you a cutting edge PC gaming experience. That alone is enough to disqualify this from any recommendation. We don't spend thousands building gaming rigs so that we can pretend they're iPhones and play iPhone games and mobile apps. This game features very lacklustre minimalist "art" for graphics instead of anything remotely contemporary. I'm sure the "developer" thought this would come across as "artistic", but it doesn't, it comes across as "really lazy". Yes, contemporary 3D graphics take a lot of time and effort to create. That doesn't mean it's okay not to bother! Developers must try to understand that gaming is a visual medium, and gamers spend a lot of money on high end gaming rigs for a reason. And that reason is not so they can look at lazy, phoned-in half efforts like this. Now on to pricing and value for gamers. This is "free" enough (not every "free" game in the "free" section is truly free, there's usually some hidden price tag), at least you won't be expected to spend any more money after you download this, but just because something is free doesn't mean it's good, and the cost of a game is more than just financial, your time is valuable too. In terms of public reception, this failed. There's over 130 million unique gamers visiting Steam every month. SteamDB showed the game peaked at [b]only 2 concurrent players[/b]... this is a dismal public reception. This was so bad they couldn't even give it away. Bearing in mind that free games don't add +1 to your game collector count, should you bother adding this to your library and downloading it? What's the verdict? Not this time. This isn't worth downloading. While this won't cost you any money, you get what you pay for, and sometimes, even when the game is free, it's still not enough.
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Related
| Game | Estimated lifetime revenue | Reviews | Review score | Price |
|---|---|---|---|---|
| $0 | 0 | — | Free | |
| $7.7K | 32 | 100% | $7.99 | |
| $644 | 6 | 100% | $3.99 | |
| $125 | 10 | 90% | $0.99 | |
| $0 | 14 | 57% | Free | |
| $0 | 32 | 91% | Free |