Raked in 25 million in its first month—is another SLG game the hit of the year?

In 2026, the formula for hit casual SLG games is still going strong.

Since 2023, DianDian Interactive has launched *Whiteout Survival*, which quickly gained widespread popularity thanks to its seamless blend of a snow-and-ice survival theme with simulation and strategy gameplay, instantly igniting excitement in the global casual SLG market.Since then, a series of titles—including *Three Kingdoms: Ice Age*, *Kingshot*, and *Last War: Survival*—have followed suit, each achieving impressive market results that continue to demonstrate the genre’s robust vitality.

Recently, this booming sector has welcomed a new entrant. Since its official launch on February 11 of this year, 37 Interactive Entertainment’s new game *Last Asylum: Plague* has entered the Top 100 Free Charts in over 40 countries and regions worldwide, while also ranking in the Top 100 Top-Grossing Charts in more than 30 countries and regions.with estimated revenue nearing 30 million yuan, including over 25 million yuan in the first month alone (Source: DianDian Chuhai). Furthermore, based on revenue trends, its revenue continues to rise steadily.

Revenue figures for *Last Asylum: Plague*, Image source: DianDian Data

This naturally raises the question: with competition in the casual SLG market now well into its later stages, how exactly has this game managed to stand out from the crowd?

01

Different themes and visual styles

At first glance, the game breaks away from the homogenized themes that plague the SLG genre, weaving a rich and authentic slice of European history into its narrative and offering a unique thematic approach and visual style.

Previously, most casual SLG games on the market featured themes such as post-apocalyptic snow-covered worlds, zombie-infested wastelands, and modern survival scenarios. However, the top-selling titles have already exhausted these themes, making it difficult for subsequent games to offer anything fresh.In contrast, this title takes the 14th-century European "Black Death" as its core setting: as the plague swept across Europe, towns became infected zones, and people sought refuge in desperation. This historical period inherently carries a narrative of "survival against all odds"; it is not only a collective memory familiar to everyone in Western society but also possesses intense narrative conflict and survival tension, making it highly compatible with the management-survival and strategic growth mechanics of casual SLG games.

Even more ingenious is the fact that the game drew inspiration from the historical figure of the "plague doctor" (also known as the "beaked doctor") when designing its protagonist. This image is based on the specialized protective gear used in 17th-century Europe, which was designed by the French court physician Charles de L'Horme.

This protective outfit consists of a pointed-nose mask, a waxed-cloth robe, leather gloves, and a long staff. The pointed-nose mask is filled with spices and herbs, which, according to the “miasma theory” of the time, were used to filter the air and reduce the risk of infection;The one-piece robe, leather pants, leather gloves, wide-brimmed hat, and transparent glass goggles were used to provide physical isolation, preventing skin contact with patients and contaminants; the long staff was primarily used to direct patients and examine their bodies, thereby reducing the risk of direct contact.

Through the widespread circulation of European prints and medical illustrations, the image of the beaked doctor became the iconic representation of the plague doctor in later generations. In the process, this highly recognizable figure gradually evolved into a cultural symbol of plague and death, frequently appearing in popular culture works such as films, television, and video games.For example, hit game franchises such as *Darkest Dungeon*, *Bloodborne*, and *Assassin’s Creed* have all utilized this classic visual element; however, in the mobile gaming sector, similar themes and imagery had rarely been seen prior to this.

In terms of visual design, *Last Asylum: Plague* stays true to its core theme of the Black Death in medieval Europe. The game adopts a somber, slightly retro-realistic style, using environments, architecture, and character attire to create an oppressive yet mysterious atmosphere reminiscent of a medieval plague-stricken region.This stands in stark contrast to the current mainstream art styles in the casual SLG genre—such as cold-toned snowy survival settings and post-apocalyptic wastelands filled with zombies—and delivers a direct visual impact to players through its distinctive dark gothic aesthetic.

The game’s distinctive thematic choices and visual design have not only significantly enhanced its brand recognition and immersive experience but have also provided a distinct advantage in the creation and distribution of user acquisition creatives. According to App Growing International, the game’s ad creatives make extensive use of exaggerated visuals to depict themes such as rodent infestations and patient treatment, and these visuals have all achieved strong exposure.

Popular game assets, estimated impressions: 5.2M, Image source: App Growing Global

Popular game assets, estimated impressions: 2.9M, Image source: App Growing Global

02

Experiments in integrating unique gameplay elements

In addition to changes in visuals and themes, the game also introduces new gameplay mechanics, incorporating the popular idle arcade style—a major trend in the hyper-casual genre—as an introductory element in the early stages.

The secret to a successful casual SLG lies in the seamless integration of casual and SLG elements: in the early stages, the game uses lightweight casual gameplay to lower the entry barrier and quickly attract a broad user base; in the later stages, it relies on deep strategy and progression systems to ensure retention and drive monetization. Among these, the casual gameplay module is key to determining the game’s user acquisition efficiency; therefore, many developers directly incorporate established casual gameplay mechanics from the market as secondary features within their games to reduce user acquisition costs and improve advertising efficiency.

For example, *Last War: Survival* introduced a "digital gate" mechanic early in the game, *Kingshot* incorporated tower defense battles as a tutorial experience for players, while *Last Asylum: Plague* opted for an idle arcade gameplay style.

When players enter *Last Asylum: Plague*, they take on the role of the Beak Doctor. By swiping the screen to control the character’s movements, players must personally handle the entire process—from seeing patients and making diagnoses to dispensing medication, administering treatment, and collecting fees. The coins earned can be used to expand wards, hire nurses, gradually automate hospital operations, and unlock additional areas and features.

This type of idle arcade gameplay—which is easy to pick up, highly engaging, and offers instant feedback—has won over a massive global player base. Titles such as *My Perfect Hotel* and *Pizza Ready!* have consistently ranked at the top of global download charts for extended periods. According to App Magic data, downloads of idle arcade games had already reached 1 billion by 2024, demonstrating their strong ability to attract players.

《Pizza Ready!》

*Last Asylum: Plague* introduces this gameplay right at the start of the game, quickly capturing players’ attention with an accessible and highly satisfying experience, then naturally guiding them through the story to gradually evolve the gameplay.When the hospital’s reception capacity and supplies run low, the game seamlessly introduces PVE combat mechanics. Players must defeat waves of rats and infected enemies to reclaim resources for base expansion, while assigning tasks to survivors, thereby smoothly transitioning into the base management phase.

Later in the game, unexpected events—such as heroes facing peril—will occur, prompting players to unlock tiles, collect antidotes, construct new buildings, assemble teams, and level up heroes within a limited timeframe, creating a fast-paced progression loop.

As players progress through the game, they will unlock the final world map, gaining access to in-depth strategic content such as alliances, territory exploration, resource battles, and faction expansion, thereby completing the full transition from "idle arcade" to "simulation management" to "strategy game."

Overall, *Last Asylum: Plague* still follows the common formula of simulation management + card-based progression + strategy game (SLG) in its core framework. However, its true highlight lies in the deep integration of a theme and gameplay mechanics that are highly recognizable to its target audience, significantly enhancing narrative immersion;At the same time, the early-game arcade-style idle mechanics lower the entry barrier and provide instant feedback, ensuring efficient user acquisition while giving the game a stronger sense of novelty and distinctiveness.

Given the game’s current performance, it’s clear that the combination of a unique theme and lighthearted casual gameplay still resonates with players. As for whether this title can sustain its current growth momentum and establish a foothold in the highly competitive casual SLG market, only time will tell.