Doomsday Hunters: Boss Rush Mega Pack (AppID: 2685580)

Doomsday Hunters: Boss Rush Mega Pack is the first expansion for our beloved roguelike shooter, offering an even more extensive array of content. If you find yourself craving more of the exhilarating synergies and ugly monsters, this DLC is for you! We're thrilled to introduce a brand-new game mode: Boss Rush. As the name suggests, you'll face off against a succession of challenging bosses, all while accumulating incredible power!

• 50+ new items including cool new relics, along with those that give you cool new familiars. All unlocked by default, so you don't have to grind to unlock them.
  
• Boss Rush mode with some new locations you haven't seen yet.
  
• 40+ Completely New Bosses with some cool attacks and patterns - more than double the original content, these will be available in classic game mode as well.
  
• 10 new guns to add to your arsenal.

At the same time we're also introducing a beta version of the level editor that this game was created with. It's very dev-oriented and requires a lot of knowledge to use which we can't really provide at this point (recommended to join our discord server). It doesn't require this DLC and all you have to do is press 'E' key in main menu.