Asphalt 9: Legends is a high‑octane arcade racing game developed by Gameloft Barcelona, originally released in July 2018 for iOS, Android, and Windows, later expanding to platforms like Nintendo Switch, Xbox, and macOS. In July 2024, it was reimagined and renamed Asphalt Legends Unite with enhanced graphics, a refreshed interface, and expanded cross‑platform support
The Nitro system features multiple tiers: Basic, Level 2, Perfect Nitro, and the powerful Shock Wave boost (also called Nitro Shockwave), which is reintroduced from Asphalt 6: Adrenalin