Observe the World Closely for a Revelation-Like Spark! 5 Puzzle & Mystery Games with “Satisfying Ideas” [Steam Autumn Sale]

From October 2 to October 9, 2026, Steam is hosting the “Steam Autumn Sale 2026.”

Here, we’ve picked out five puzzle games that go beyond simply solving them—games that will make you think, “You solve it that way?!” We’ve got everything from old-school titles that challenge you to think through logic to the latest trend in knowledge-unlocking games.

"Leap Year" – 20% off: ¥464

At first glance, this is a simple 2D platformer where you navigate levels with slightly unsteady movements. You control a protagonist with even less stamina than a character in *Spelunker*—one who twists an ankle just from landing at the same height as you—and collect scattered calendars.

However, due to this frailty, you’re constantly forced to take detours. As you go back and forth along paths that *Mario* would breeze through, you gradually begin to realize the depth of this world…

With over 40 rooms to explore, the playtime is compact at around 2 hours. It’s a masterpiece of a puzzle platformer packed with “aha!” moments throughout. Be sure to check out the DLC, “Leap Year March,” too!

“Super Drift Blade” – 35% off ¥520

Right from the start, the protagonist gets defeated by the boss. And in the process, they lose almost all control over their character. The only thing you can do is move by sliding the mouse—clicking actually takes damage… You must embark on this adventure with such pitiful stats.

As you retrace the same path over and over, you’ll start to sense something off about the monotonous scenery. That moment of insight is crucial.

On the surface, it’s an action roguelike, but at its core, it’s a thoroughly over-the-top metafiction puzzle. Experience the primal thrill of breaking the game apart and rewriting it.

“Can of Wormholes” – 50% off: ¥1,150

The protagonist is a bug wearing a can! The way its many legs wriggle out from the cracks is both creepy and cute.

Despite its quirky appearance, the gameplay is a highly logical puzzle. It’s designed like a hybrid of a warehouse management game and a “snake game” where the creature grows larger as it eats, and your goal is to control the long, slender worm and reach the finish line without getting stuck on the walls. This is actually quite challenging.

Despite its simple rules, the game grows increasingly complex—it’s a substantial title that puzzle fans will find irresistible.

"ANIMAL WELL" - 30% off ¥2,065

A pixel-art Metroidvania with an incredibly cute look… It has a surprisingly small file size, so it should run on just about any PC.

Everything, right down to the plants growing from the ceiling, is meticulously rendered, making it a real treat to look at as pixel art.

Of course, it’s not just about the visuals—the gameplay is quite deep as well.

Players make use of toy-like items—such as “yo-yos” and “discs”—found throughout the world to uncover the secrets hidden in the well where animals live quietly.

There are multiple ways to use each item, and the fact that every player’s solution can be completely different is one of the game’s greatest strengths.

As they say, “The main story is just the beginning”—there are plenty of puzzles to solve even after you’ve beaten the game… How many can you solve?

"Outer Wilds" – 50% off: ¥1,625

I just can’t wrap this up without mentioning this one!

*Outer Wilds* is a masterpiece among masterpieces—a true hall of fame for knowledge-unlocking puzzles. You can finally play it for 1,625 yen. It’s practically free!

Wander through a universe that loops every 22 minutes, explore ruins, and observe strange phenomena—information you find on other planets gradually connects with events that previously made no sense. Those “Oh, so that’s what that was!” moments are the game’s greatest reward.

You never actually “level up” as a player; instead, the path opens up as you grow accustomed to this world and become wiser. It’s an essential title when discussing this genre. Please be sure to experience it without any spoilers.