I'm a bit confused. Is this a newer version than the one in OP?
But it's only 2.5G compare to OP's 3.5G (also with 2 guides, the DLC guide seems to contain Driller)?
And other than Your 3 DLC.rpa are 1G smaller than OP's, I don't find any difference.
Well, I was just as confused as you were in the beginning. I read the post "123456789iaiao" where he said the version of OP can't play the Driller DLC because it is not the latest (the version of OP is v1.18.2).
In the v.1.18.2, when you click on "NEW CONTENT option" to play the DLC, only 2 DLC is playable (the brotherhunk - capidlc.rpa and versivison - versidlc.rpa), even if you already had the "Driller Turn DLC" (drillerdlc.rpa) in the "game" folder.
So I searched the Internet and I found the game with version v.1.20.1, but it doesn't have any DLC, just the base game (archive.rpa). So I copied the DLC (capidlc.rpa, drillerdlc.rpa and versidlc.rpa) and put it into the same folder with the base game. The game can play all the DLC because the "NEW CONTENT option" is different from the v1.18.2
The different size, which I believe happened because of the compression, because the folder sizes are all over 3 GB after it is extracted. The game which I posted is the version that I played the "Driller Turn DLC" (v1.20.1).
This is the file sizes of both game folder (v1.18.2 and v1.20.1)
The "NEW CONTENT options" on v1.18.2
The "NEW CONTENT options" on v1.20.1