Alongside a number of fixes that, among other things, addresses the Maximum Security Achievement/Trophy bug, The Callisto Protocol's latest update has added New Game+.
Striking Distance Studios shared the patch notes for the v. 3.01 update on Reddit, and it will finally allow players to jump back into the horrors of The Callisto Protocol after they roll credits with all of their weapons, upgrades, and Callisto Credits.
Some of the other fixes include general performance optimisations, players no longer taking damage when vaulting over objects, voice levelling and subtitle mismatch adjustments, and much more.