Spartan Cores were introduced in Halo Infinite, released in 2021 as part of the long-running Halo first-person shooter series following Master Chief. In campaign play they are collectible upgrades scattered across Zeta Halo that improve equipment such as the Grappleshot and shields. The short pickup cue became easy to isolate and reuse outside the game, spreading through gaming clips, soundboards and short-form edits. Its clear association with unlocking an upgrade keeps it popular for any moment framed as leveling up or gaining new gear.