Royal Hero Online

ROYAL HERO ONLINE : 

1. Style: The game is built on a custom Web 2.5D engine, featuring a nostalgic, isometric visual style heavily inspired by classic MMORPGs like Ragnarok Online (RO).

2. Map: Players navigate a pseudo-3D grid-based map environment, exploring different zones, towns, and monster-filled fields using point-and-click or touch controls.

3. Level: By engaging in combat and defeating monsters, players earn experience points to increase their character's level and boost core attributes.

4. Job: Character progression is tied to a classic job (class) system, dictating the player's primary combat role and available abilities.

5. Skill: As players progress, they unlock active and passive skills that can be assigned to a customizable hotkey bar for real-time tactical combat.

6. NPC: The game world is populated with interactive NPCs (Non-Playable Characters) who provide guidance, dialogue, and essential services to the player.

7. Shop: Players can interact with merchant NPCs via an in-game shop interface to buy healing items, upgrade equipment, and sell their gathered monster loot.

8. Interface: The UI features draggable, classic-style windows for inventory and stats, alongside mobile-friendly touch slots for firing off items and abilities.

9. Combat: Battles happen directly on the field in real-time, requiring players to manage their HP/SP, auto-attacks, and skill cooldowns to survive.

10. Overall: It acts as a fully functional, browser-based RPG engine designed to capture the classic grinding, trading, and exploration loops of early 2000s online games.