The game is not fully "free-to-play," but you can access large portions of it without purchasing:
You can play for free using the Lite version (or "Free Trial") available on consoles, or by taking advantage of limited-time official giveaways for PC. 🎮 Free Versions by Platform Naruto to Boruto: Shinobi Striker Free Game Dow...
Play as core characters like Naruto, Sasuke, Sakura, and Yamato. You can also use Season 1 & 2 characters for free, though you cannot equip their moves on your custom avatar without the DLC. The game is not fully "free-to-play," but you