Brutal Doom v21 GOLD has been released back in the May 2019, it includes several improvements (please look at the changelog from Moddb), especially in case of the performance. This is most likely the final release of Brutal Doom so enjoy the show (SgtMarkIV is busy with another project).
After finding a really strange portal to the nowhere, Doomguy is teleported to the Castle Wolfenstein, full of really nasty enemies basically everywhere. This final secret level may be quite troublesome at the beginning, but you also gain a unique MP-40 Submachine gun - with possibility to dual wield and aim, a great addition to your arsenal. After escaping the Castle Wolfenstein through the portal, you are back to current timeline deep inside the Underground of Los Angeles. This is the only way to reach the UAC Headquarters where Gates of Hell have been opened two days ago, quite a long trip to be honest. Thankfully there are two tanks nearby for your disposal, a light and medium - both are different during the gameplay, choose a better one. The Light Anti-aircraft Tank is equipped with dual 20mm quad cannons, a really awesome choice against anything on the ground, there are also homing missiles - Cacodemons don't like them. The Medium Tank is better armored but also much slower, it's equipped with a Heavy Machine Gun and 120mm smoothbore anti-tank cannon - this tank is harder to maneuver, avoid to be stuck at all costs. After reaching the UAC Headquarters, there is a Guardian to be defeated - this is a really tough opponent, Rocket Launcher with auto-lock modification is an awesome choice against it, same goes for Plasma or Tesla Cannons. And this is where our saga on Earth ends, prepare to the Counter-Offensive on the other side of the Portal...
00:00 - Wolfenstein
12:47 - Final Destination
22:45 - Downtown Assault
36:34 - Eye Of The Storm
40:13 - Counter-Offensive
46:00 - The Tower
50:26 - Into The Black Jungle
Brutal Doom ModDB - https://www.moddb.com/mods/brutal-doom
Brutal Doom Facebook - https://www.facebook.com/BrutalDoom/
Brutal Doom v21 - https://www.moddb.com/mods/brutal-doom/downloads/brutal-doom-v21-beta
Doom 2016 Arsenal - https://www.moddb.com/mods/brutal-doom/addons/doom-2k16-arsenal
Extermination Day - https://www.moddb.com/mods/brutal-doom/forum/thread/extermination-day-pre-beta-download
SimpleHUD addons - https://forum.zdoom.org/viewtopic.php?f=46&t=60356
Duke Nukem 3D Atomic Font - https://realm667.com/index.php/en/font-press/general/1806-duke-nukem-atomic