There is disclosed a device, system, and method for a ROM BIOS based trusted encrypted operating system for use in a gaming environment. The gaming device includes a ROM storing a BIOS, a secure loader, an encrypted operating system, and a decryption key for decrypting the encrypted operating system. The decryption key is partitioned and scattered about the secure loader. The method includes initializing the BIOS, locating the decryption key, decrypting the encrypted operating system with the encryption key, verifying a plurality of check codes, and transferring control to the operating system. The check codes are verified responsive to decrypting the encrypted operating system. The check codes are dispersed about the operating system and are unrelated to the operating system. Control is transferred to the operating system responsive to verifying the check codes.