Nearly a year on from the launch of MachineGames' brilliant Indiana Jones and the Great Circle, the studio is back with an additional chapter, The Order of the Giants, which arrives on September 4. For those who enjoyed the base game's blend of puzzle-solving and fisticuffs, this fresh DLC adds more of what you love — and takes a novel approach to tuning its difficulty, based on your experience with the Great Circle so far.
As far as I’m aware it’s like standalone in the sense that it’s separate from the main game, like you access it through the menu.
And my question is more, what incentive does the player have for playing this before the base game.