Developed by the Enclave in 2220, the Advanced power armor Mark I is the first true production run of the advanced power armor family. Initially designated Mark II Powered Combat Armor, the Advanced power armor Mark I is also the first model of power armor designed, produced, and deployed after the end of the Great War. This armor was developed off of the pre-war designed X-01 power armor, over coming the flaws of it's predecessor. The Advanced power armor Mark I was the standard service armor of Enclave soldiers by 2241.

• Gannon Family Tesla Armor, a unique variant of the Remnants Tesla Armor, which was cut from the final version of the game

• Enclave Power Armor
• T-51b Power Armor
• T-45d Power Armor