A single-player horde mode will replace it. Doom Eternal will drop the long-promised Invasion Mode for another single-player mode as a result of the COVID-19 pandemic, id Software has recently confirmed. Executive Producer Marty Strattoon took to Twitter with the news. “We intended to release a free Invasion Mode update for the game; however, the unforeseen consequences of the pandemic and remote working impacted the process of development for this addition,” Stratton wrote. Invasion Mode was first detailed back in October 2019, a mode in which one player could enter the game of another as a demon, and was meant to be released shortly after the game’s (delayed) launch in March 2020.