Overview
You can verify your version by looking at the file size or checking the loading screen. Note that the "v1.1" on the loading screen often refers to the Hexen engine version, not necessarily the HEXDD.WAD file itself. To fix a v1.0 file, fans typically use the dkpatch.zip utility available on community sites like the Doom Wiki. hexdd.wad v1.1
Hexen: Deathkings of the Dark Citadel is the official expansion pack for Hexen: Beyond Heretic. While it was initially sold in stores as a standalone disc, it required the original Hexen data to run. In the modern Doom/Hexen modding community, this expansion is known technically as HEXDD.WAD. Review: hexdd
Pulling a lever to drain water in a "Guardian" map would visually reflect as lowered water levels in the main hub map. Hub-Wide Threat Scaling: You can verify your version by looking at
So:
hexdd.wad v1.1 is likely the main game data file for the Hexen: Deathkings of the Dark Citadel expansion pack (version 1.1).