Sunder

Sunder is an in-progress megawad for Doom II, developed by Insane_Gazebo. Intended to be a full megawad, it saw its first release in 2009 with more levels expected to be added later, although Insane_Gazebo later left the Doom community, with many believing Sunder to be abandoned, with 14 maps. However, on the 8th of February 2019, Insane_Gazebo returned to the community, posting an image of a map in progress, indicating that the project was back in production. An update was released on June 10, 2019, adding four new maps, while MAP17 followed on August 14 and MAP18 on December 9 of the same year. In 2020, MAP19 was added on April 9.

It is a slaughter-based level-set, with monster counts ranging from the hundreds to thousands in each map.

In 2018, Sunder was included in the Top 25 Missed Cacowards.

Hive mother
A new monster was added with the release of MAP18. The Hive mother is a mini-boss monster, depicted as a huge wasp-like demon, replacing Commander Keen. They have 2000 health, and attack by launching a flurry of 14 mancubus fireballs. Additionally, triggering their pain state (which has a chance of 3.13% per hit, the same as the arch-vile), will cause the creature to hover above the ground and launch a volley of three rockets in rapid succession. The sprites for the monster were created by TheMisterCat, based on an old sketch by Insane_Gazebo.

Levels
Secret levels

Soundtrack

 * MAP01: "Lunar Military Base" from 
 * MAP02: TNT: Evilution MAP06 theme
 * MAP03: "Under Death" by Mark Klem (from Requiem)
 * MAP04: "Double, Double, Toil and Trouble" by Guy Whitmore and Daniel Bernstein (from )
 * MAP05: "Become the Hunted," by James Paddock (Jimmy) (from Plutonia 2)
 * MAP06: Remix by Jay Reichard (silentzorah) of "Suspense" from Doom, originally by Robert Prince
 * MAP07: "Demons on the Prey" by Robert Prince (from Doom)
 * MAP08: "Fight the Logic if you Can" by Chris Laverdure (Dashiva) (from Alien Vendetta)
 * MAP09: "Industrial" by Simon Judd (sirjuddington) (from Hellcore 2.0)
 * MAP10: "Sneaky Snake" by Robert Prince (from Duke Nukem 3D)
 * MAP11: SA-X Arrival theme from 
 * MAP12: "Europa Mining Colony" from 
 * MAP13: "Ending Title" from , by
 * MAP14: "Guardhouse" by James Paddock (Jimmy)
 * MAP15: "Sunset Over Babylon" by James Paddock (Jimmy) (from Jenesis)
 * MAP16: "Gate of the Ancients" from , edited by Scotty
 * MAP17: "Simple Solutions" by Mark Klem (from STRAIN)
 * MAP18: "Plasma" by (from Duke Nukem 3D)
 * MAP19: "Outer Darkness" by John Weekley (PRIMEVAL) (from Plutonia: Revisited Community Project)
 * MAP31: The Mucus Flow theme by B.P.R.D
 * MAP32: "Aorta" by Tristan Clark (Eris Falling) (from Panophobia)


 * Title screen: "Briefing" from 
 * Intermission screen: "Mysterious Statue Chamber" from