Beneath the Viral Fanservice, Lost Sword Is a Surprisingly Solid Idle RPG

Lately, quite a few people have been asking about Lost Sword, a Korean anime-style RPG that has been quietly dominating overseas markets.

You may have already seen clips of it somewhere: gorgeous anime-inspired characters, fluid side-scrolling combat, and the character damage animation that made it go viral. To dismiss it as nothing more than fanservice would be selling this game short. It raked in over $10 million within 50 days of launch and once claimed the top spot on both the revenue and download charts for gacha games in South Korea.

In a market where idle games are generally boring and gacha titles are fiercely competitive, how did a game many players treat as a side game manage to become a dark horse?

The Arthurian Legend, Reimagined as a Waifu-Collection Adventure

Lost Sword is developed by CodeCat and published globally by Wemade Connect, with its worldwide launch in July 2025.

The premise is straightforward: Excalibur has vanished, the red dragon that protected the kingdom has been vanquished, and Princess Elizabeth disappeared while on a quest to find the sword, plunging the world into chaos. You play as Ethan, a young man transported from the modern world, joining the Princess’s cause in the otherworld of Britannia, pushing through stages while collecting a diverse roster of anime-style waifus.

When you first jump into the game, the art style is the first thing you notice—high-quality Live2D artwork, skill animations that look like hand-drawn anime cuts, and a level of fluidity that ranks among the best in the side-scrolling genre. The producer has mentioned that the skill animations are created by a professional animation studio, and the Live2D tech is deployed across the board: gacha pulls, lobby interactions, and story dialogue. The voice cast features top-tier Korean talent.

What are players saying?

“It’s not flashy, but the Live2D frame count and animation flow are surprisingly solid. Feels really light and fun to play.”
“The skill animations feel like watching an anime. They don’t get old even after playing for a long time.”

The Damage Animation That Made the Game Go Viral

What truly made Lost Sword blow up, however, is its costume-break animation system.

When a character’s HP drops to zero, a dedicated Live2D sequence is triggered, showing the character’s outfit in a damaged state. This isn’t a simple texture swap. It’s a frame-by-frame animated sequence featuring fabric tearing and subtle body movement. The level of detail is striking.

Sounds gimmicky? Take a closer look, and it’s really the same top-tier Live2D tech applied across different scenarios. The dev team didn’t hide it at all—they even released a compilation of these animations as promotional material, telling the market loud and clear: we don’t just draw well, we know exactly what we’re drawing.

This same technology extends to character design as well. Familiar names like Merlin and Morgan le Fay are reimagined as distinct anime-style waifus, woven into the main storyline and character relationship web, thoroughly transforming the classic Arthurian legend.

Core Gameplay: Side-Scrolling Idle, Tactical Team Building

Once you enter battle, you’ll quickly realise this is an AFK side-scrolling real-time combat RPG. Your characters charge and fight automatically. There’s only one thing for you to do—pre-battle formation.

• Assemble a 5-person squad, deciding on front-row tanks and back-row DPS positioning
• Build your team around enemy elemental weaknesses, skill synergies, and counters
• Each character’s skills come with unique animations and effects that are visually satisfying

The daily content is substantial, but the pacing clearly caters to side-game players:

Free-to-Play Experience: Generous Rewards, But You’ll Need Self-Control

Regarding the free-to-play experience, two opinions constantly appear in the community: “This game has great rewards” and “You’ll hit a wall without spending.” These are not really contradictory.

Let’s start with the good parts. Early story stages, check-ins, and coupon codes combine to give out a fair amount of diamonds and 10-pull tickets. Stacked with all the one-time newbie resources, free-to-play players can pull several desired characters early on. Plus, the game does not have a gear gacha—weapons and armour are obtained purely through stage drops and material crafting. The gacha pool only produces characters and pets, sparing you the headache of “I pulled the character but now I need to pull their signature weapon.”

But to be honest, the progression system heavily incentivises pulling duplicate characters. Dupes are not just about stat boosts—at 3-Limit Break and 5-Limit Break, all skill levels increase by 1. The Resonance system also allows trading dupes for exclusive equipment, so free-to-play players will feel a definite ceiling in PvP. Each 10-pull costs 2000 diamonds, with a 120-pull pity. After the initial one-time rewards run out, relying purely on daily diamond income means your pulling pace will slow down. Gear substat RNG is also significant; rolling a god-tier piece is heavily dependent on luck.

“Free-to-play is manageable, but you need a plan. Save your diamonds, pull only for the characters you really want, and the experience is pretty decent. But aiming for a full collection or max limit breaks? That’s probably going to need a budget.”

A Few Things to Know Before Jumping In

• Incomplete Chinese localisation: Only basic content is covered. New missions and events often feature a mix of Chinese, Korean, and English. If zero-tolerance for “not understanding skill descriptions” is your thing, think twice.
• Some regions require a VPN: Standard practice for Korean gacha games going global, but it is an additional cost.

Who Is It For? Some Honest Thoughts

Those who love delicate 2D art and Live2D waifus will likely find it hard to delete once they’ve tried it. If you’re looking for a low-commitment idle game you can AFK through, the daily routine here won’t feel like a chore. Casual free-to-play is perfectly viable—the early-game rewards are enough to unlock most of the core experience; the mid-to-late game requires planning and patience, not forced spending. Monthly card buyers will feel even more at home.

Conversely, if you seek hardcore mechanical depth and balanced competition, the AFK nature of auto-battle means your skill ceiling is locked behind your stats. Also, dupe value is high—free-to-play players aiming for top-tier PvP should temper expectations. If you accept slow and steady progression, this game is a great fit. If not, you may find yourself uninstalling once the novelty wears off.

“Even among idle games, it belongs to the most boring tier in terms of gameplay.”
“But the art style is just too good. Collecting dailies and looking at waifus every day is still pretty enjoyable.”

It Knows Exactly What It Is

Lost Sword is remarkably clear-eyed about its positioning. It has never tried to compete head-to-head with the likes of Genshin Impact or Honkai: Star Rail. Instead, it has precisely targeted the niche intersection of idle, anime-style, and waifu collection, using high-quality art and viral appeal to win over its core audience.

If the art style speaks to you at first glance, give it a try regardless of your budget. But if you seek long-term competitive fairness or have a deep aversion to gear RNG, it might be one of those games that sits on your phone for a few days, then quietly bows out before the next update.

All game screenshots, character designs, and related assets referenced in this article are the property of CodeCat and Wemade Connect. The article itself is an original work of commentary and curation. Please credit the source if reposting. For copyright concerns, contact yomiqo@126.com.