In Days Gone, NERO (or IPCA) tech refers to technology that can be found across the game at its various NERO Research Sites.
Days Gone game director Jeff Ross has said in a recent interview that a sequel to the game would have moved the series in a “more technical direction” had Sony decided to revisit the franchise for a second time.
Ross also recently made headlines after comparing the success of Days Gone to Ghost of Tsushima.
“The swimming thing in Days Gone, it’s the worst,” Ross explains.