Stella Sora: Yostar's Fantasy RPG Blends Roguelike Action with Memory-Erasing Mysteries

Yostar made waves in the mobile and PC gaming scene when it launched Stella Sora (ステラソラ) on October 20, 2025. This isn't just another gacha RPG—it's a self-developed title that showcased the studio's ambition to craft something genuinely different in a crowded market. The game threw players into a fantasy world where treasures came with a price: your memories. If you've been craving an RPG that blends adorable chibi aesthetics with genuinely dark narrative hooks and roguelike depth, Stella Sora delivered exactly that experience.

The premise alone hooked hardcore RPG fans from day one. You played as an amnesiac being known only as "the Demon King," who woke up inside a treasure chest discovered by the Blank Journey Guild. From there, the adventure spiraled into something far more complex than a typical fantasy romp. The game explored themes of identity, sacrifice, and the cost of desire through its central mechanic: wish boxes that granted powerful items but erased chunks of your memory in exchange. This Faustian bargain formed the narrative backbone of the entire experience.

What set Stella Sora apart from other mobile RPGs was how it committed to its core concept. Every system, from the combat to the character relationships, tied back to this idea of losing yourself piece by piece in pursuit of power. Yostar didn't just slap a gimmick onto a generic gacha framework—they built an entire game around exploring what happens when you can't remember who you were.

Story and Setting: The Demon King Who Forgot Everything

The world of Nova Continent became your playground the moment you emerged from that treasure chest. The Blank Journey Guild—a ragtag group of adventurers—found you and decided to bring you along on their quest to locate "divine instruments" hidden within the mysterious Star Tower. These weren't ancient magical artifacts, though. They were modern items: smartphones, cameras, everyday objects from another world that possessed inexplicable power in this fantasy realm.

The narrative leaned hard into the mystery. Why did these items exist here? What was the Star Tower's true purpose? And most importantly, who were you before you lost your memories? The game didn't rush to answer these questions. Instead, it let them simmer throughout your journey, dropping breadcrumbs that kept you theorizing long after you put down your phone or closed your laptop.

The wish box mechanic was where things got psychologically interesting. These boxes could grant nearly anything you desired—rare equipment, powerful abilities, even answers to lingering questions. But every time you opened one, you paid with memories. The game visualized this through fragmented cutscenes and dialogue where characters would reference events you couldn't recall. It created this unsettling feeling where you knew you were becoming stronger, but you were also becoming less of whoever you once were.

Your companions in the Blank Journey Guild each had their own relationships with these wish boxes. Some used them liberally, willing to sacrifice their past for present power. Others refused to touch them, clinging desperately to their identities. These philosophical differences created genuine party tension that elevated the story beyond typical "power of friendship" narratives. The game asked: if you can't remember your experiences, are you still the same person?

Gameplay Features: Turn-Based Combat Meets Roguelike Chaos

Stella Sora's combat system initially looked simple with its deformable chibi characters rendered in 3D from an overhead perspective. Don't let the cute art style fool you—the tactical depth revealed itself quickly once you pushed past the early stages. The turn-based action required careful party composition and strategic thinking, especially when you ventured into the game's multi-layered dungeons.

Your party consisted of three members: one active combatant and two support characters. The active character executed commands each turn while support members provided passive bonuses, buffs, or could be swapped in when situations demanded different tactical approaches. Character swapping mid-battle wasn't just a gimmick—it was essential for surviving tougher encounters where enemy compositions required specific counter-strategies.

The Talent card system added another layer of customization that separated casual players from hardcore theorycrafters. These cards functioned like skill trees crossed with deck-building mechanics. You equipped Talents to enhance abilities, unlock new skills, or create synergies between party members. Finding optimal Talent combinations became a mini-game in itself, and the community quickly developed meta builds that maximized damage output or survivability.

Roguelike elements dominated the dungeon exploration experience. Each floor of the Star Tower featured procedurally varied encounters, random events, and branching paths. You couldn't just memorize patterns and grind the same route—every run felt different. Environmental hazards, elite enemies, and treasure rooms appeared in different configurations, forcing you to adapt your strategy on the fly.

For players who didn't want to micromanage every battle, Yostar included an auto-battle mode. This accessibility feature let you breeze through easier content while still requiring manual control for challenging boss fights and late-game dungeons. It struck a good balance between respecting your time and maintaining engagement during critical moments.

The difficulty scaling impressed those of us who completed the main story and dove into post-game content. The Star Tower's deeper floors became genuinely punishing, demanding optimized builds, perfect timing on character swaps, and deep knowledge of enemy patterns. Yostar clearly designed this for players who wanted to test their mastery of the systems.

Character and Relationship System: Dating Your Way Through Amnesia

Beyond the combat and dungeon crawling, Stella Sora invested heavily in its character relationship system. The game featured a dating sim layer that wasn't just tacked on for gacha appeal—it integrated meaningfully with the narrative themes about memory and identity.

KokoChat served as your primary communication hub with party members and NPCs. This in-game messaging system let you chat with characters, deepening your bond through dialogue choices. The writing here ranged from lighthearted banter to surprisingly emotional moments where characters confessed their fears about losing memories or confronting their past mistakes.

The trust level system tracked your relationships with each character. You raised trust through: - Character cultivation (leveling them, using them in battle) - Gift-giving (finding items they specifically appreciated) - Completing character-specific story conditions - Making dialogue choices aligned with their values

As trust levels increased, you unlocked special episodes that revealed backstory, character motivations, and intimate moments. These weren't just throwaway scenes—they provided crucial context for understanding each character's stance on the wish boxes and memory sacrifice. Some episodes hit hard, especially when characters grappled with whether their feelings for you were genuine or just manufactured by missing memories.

The dating mechanics let you pursue romantic relationships with multiple characters simultaneously, though the game acknowledged this through occasional jealousy events and dialogue. Yostar didn't shy away from the awkwardness of juggling multiple romantic interests, which added some unexpected comedy to an otherwise heavy narrative.

What impressed me most was how the relationship system tied back into gameplay. Characters with higher trust levels gained stat bonuses when paired in battle, unlocked unique combination attacks, and could even survive fatal blows through special "trust bond" mechanics. This created genuine incentive to engage with the dating sim elements beyond just collection appeal.

Platforms and Availability: Bringing Stella Sora to Everyone

Yostar made Stella Sora accessible across iOS, Android, and PC (Windows) at launch on October 20, 2025. This multi-platform approach meant you could start your adventure on mobile during your commute, then continue the same save file on PC at home through cloud sync functionality. The cross-platform progression was seamless—exactly what modern mobile RPGs should strive for.

The PC version particularly impressed with enhanced graphics options, keyboard/mouse controls optimized for faster menu navigation, and support for ultrawide monitors. Mobile players weren't left behind, though. The game ran smoothly on mid-range devices, and Yostar included extensive graphics settings to ensure performance across different hardware specs.

As a free-to-play title, Stella Sora monetized through optional in-app purchases. The gacha system focused on characters and high-rarity Talent cards, though Yostar was relatively generous with premium currency through event rewards and daily missions. You could absolutely experience the full story and complete endgame content without spending money, though whales could accelerate their progress through purchases.

The launch was surprisingly smooth—no extended maintenance, no game-breaking bugs that plagued early access. Yostar clearly learned from their experience publishing other developers' titles (like Arknights and Blue Archive) and applied that knowledge to their first self-developed game.

Why Stella Sora Mattered

In a mobile gaming landscape saturated with generic gacha RPGs—including hits like NIKKE: Goddess of Victory with its anniversary celebrations—Stella Sora stood out by committing to its high-concept premise. The memory-loss mechanic wasn't just narrative window dressing—it permeated every aspect of the game design. Yostar took a risk developing this themselves rather than relying on external studios, and that gamble paid off with a title that felt cohesive and thoughtfully designed.

The game wasn't perfect. Some players found the roguelike elements repetitive after dozens of hours, and the gacha rates could be stingy when chasing specific characters. But these minor complaints didn't overshadow what Stella Sora achieved: a mobile RPG with genuine narrative ambition, satisfying tactical combat, and endgame content that respected hardcore players.

If you'd been waiting for Yostar to prove they could develop their own hit rather than just publish others' games, Stella Sora was that proof. The game launched strong and built a dedicated community that appreciated its darker take on fantasy RPG storytelling.

Game Information

For more information about Stella Sora, visit the official website.