Tenacious

Tenacious is a progression achievement awarded for the "Tenacious" challenge; it recognizes the player reaching and enduring one hundred consecutive enemy waves in Mindustry's wave-based survival mode. As a progression milestone, Tenacious tracks long-term defensive success and is unlocked by maintaining your base and defenses across escalating waves rather than by crafting, building, or resource totals. It connects to the game's wave mechanics and serves as a measurable goal for players focused on endurance and late-game defense strategies.