Because this is a repack of the "Complete Edition," all DLCs are unlocked and integrated. There is no need to download Steam activation files separately.
If you are a data hoarder, a user with a 10Mbps connection, or a preservationist wanting a DRM-free copy of Columbia, is a masterpiece of compression. It works. It includes the full story. It runs without Steam. Bioshock.Infinite.Complete.Edition.REPACK-KaOs