**Introduction to RAID: Shadow Legends**
RAID: Shadow Legends is a captivating mobile and PC fantasy-themed role-playing game that plunges players into the visually stunning realm of Teleria. Developed and published by Israeli game developer Plarium, the game challenges players to assemble, train, and lead a brigade of heroes against dark forces in a bid to save a world torn by war and ancient prophecies.

**All Characters and Levels of the Game**

The game boasts a vast array of characters, known as Champions, divided into distinct rarities such as Common, Uncommon, Rare, Epic, and Legendary, each with unique abilities and attributes. These Champions belong to different factions and races, such as Banner Lords, High Elves, Dark Elves, and Orcs, enhancing the game's depth and strategic elements. RAID: Shadow Legends features an intricate leveling system where players must strengthen their Champions by gaining experience, enhancing their gear, and mastering various skill enhancements to face more formidable challenges.

**What Attracts Users Most to the Game**

Players are most attracted by RAID: Shadow Legends' intricate character progression, diverse strategic elements, and extensive campaign mode. Its visually impressive graphics and the gratification of collecting and empowering a vast roster of champions are further hooks for the audience. The thrill of battling against other players in the PVP Arena or joining forces in clan activities adds a communal aspect that resonates with many.

**Why It Is Popular**

The popularity of RAID: Shadow Legends can be attributed to several factors. Its accessibility on both mobile devices and PC allows a broad audience to enjoy the game. The combination of high-quality 3D graphics, engaging turn-based combat, and the depth of content through dungeons, boss fights, and Clan wars keep players engaged continuously. Moreover, the game's regular updates, events, and the ability to join clans provide a social, competitive aspect that keeps the experience fresh and exciting.

**Release and Versions**

RAID: Shadow Legends was released in July 2018 and has since been updated regularly, ensuring that players receive new content and improvements. Although the game maintains a single evolving version rather than multiple distinct releases, its updates are comprehensive enough to provide a sense of ongoing development and freshness. As such, the game has no separate 'versions' but rather versions in terms of updates and patches.

**The Most Difficult Part of the Game**

One of the most challenging segments of the game is the endgame content, specifically the Spider's Den and the Clan Boss battles. These levels require not only highly leveled and geared Champions but also strategic team compositions and synergies. The complexity and strategy needed to defeat these advanced stages are challenging even for seasoned players.

**Strengths and Weaknesses of the Game**

The strengths of RAID: Shadow Legends include its detailed graphics, sophisticated gameplay mechanics, and the extensive library of Champions to collect and upgrade. However, the game has been criticized for its monetization strategies, which can be aggressive, making it challenging for free-to-play users to progress at the same pace as paying players. Some users also find the gameplay can become repetitive over time.

**Other Games by the Developer**

Plarium, the developer behind RAID: Shadow Legends, has an array of strategic and role-playing games in its portfolio. Other popular titles from the developer include "Vikings: War of Clans," "Throne: Kingdom at War," "Sparta: War of Empires," and "Stormfall: Age of War." Each of these games encompasses strategy and MMO elements and showcases Plarium's signature attention to intricate gameplay systems and engaging multiplayer components.