Slayer

Slayer is a progression achievement awarded for defeating a boss in Mindustry; it records a player’s accomplishment of eliminating a boss-level enemy and is classified under the game's progression achievements. As a progression achievement, Slayer tracks a significant milestone in gameplay rather than providing a direct in-game resource, and it contributes to the player's overall achievement completion. The entry is specifically tied to the act of boss defeat and serves to acknowledge advancing skill and progress through high‑threat encounters within the game.