Slitherine

So, i have Gladius and ALL DLCs on GOG...

Where is the Onslaught Pack on Gladius ?

EDIT: this is WRONG:
At GOG' this free dls is directly integered in the Gladius game patches.
Launch your GOG game and read the new patch notes.

But, maybe (edit: actually) you're right wondering, as at now I did not yet verify this dlc is actually made ingame,
soon I may be able to see my tier 5 tek level with its new chaos psyker Rubric Marine.