In "Secret Wars", a new version of Captain America was created by Alchemax and resides in the Battleworld domain of 2099. Roberta Mendez was forcefully subjected to take the Super-Soldier Serum by her husband, Harry and became the leader of Alchemax's Avengers. Roberta and Captain America are two different personas of the same woman, with Roberta unknowing of her counterpart. She physically and mentally becomes Captain America if her trigger words, "Avengers Assemble", are said, and she reverts to Roberta if someone says "Dismissed". In the "Secret Wars" title, Captain America goes against Miguel Stone's orders to treat the Defenders as criminals and worked with the Defenders and Avengers to stop Baron Mordo and the Dweller-In-Darkness.