If you bought a physical copy from a thrift store, the previous owner likely already redeemed the key. Physical keys are one-time use only.

Have a specific error code or question about a Sims 4 license key? Drop a comment below, and remember: Always double-check the seller’s rating before buying.

Therefore, searching for a "free base game license key" in 2024 is unnecessary—the official version is already free and legal.

If you prefer owning a key (rather than a digital license tied only to your account), buy from Humble Bundle—they provide permanent, printable keys you can store offline.