They are both playable with or without Brutal Doom but it increases difficulty twofold or threefold with the mod. Now with the Brutal Doom mod florishing, it made my original Doom Co-op very fun to play so what did I do? I further increased difficulty of the maps once for the standard Brutalized set but a second time for Hardcore Brutalized. This is a project that originally stemmed from a file I named 'Doom Co-op' which started off way back in 2006 or 2007 with increased monster count more or less plus a few sound and minor graphics visuals but I eventually moved into actually adding new sections to both original sets of maps (except episode 4 of Doom) on top of making it suitable for single and co-op multiplayer.
