BillionNemesis
Adds alternate enemy arenas with harder and more interesting enemy placements to vanilla levels
By BillyMod
| Date uploaded | 2 months ago |
| Version | 0.2.0 |
| Download link | BillyMod-BillionNemesis-0.2.0.zip |
| Downloads | 266 |
| Dependency string | BillyMod-BillionNemesis-0.2.0 |
This mod requires the following mods to function
BepInEx-BepInExPack
BepInEx pack for Mono Unity games. Preconfigured and ready to use.
Preferred version: 5.4.2305
BillyMod-SpawnerArmExtras
Unlocks missing enemies in the sandbox + adds new custom ones. Now also works for cheats
Preferred version: 6.0.1README
Billion Nemesis
This mod aims to redo all the arenas in the main campaign by making them more interesting and a lot harder. Kind of like Encore levels except it all takes place in the original levels instead of brand new ones (Use Configgy to switch between Nemesis and vanilla)
Generally I tried to use interesting enemy combinations and to play into the environment/level geometry so that you approach things in more unique ways and such. The new encounters aren't limited in enemy types and late game enemies can appear from the very start. So I recommend beating Fraud if you haven't done that yet
Nemesis levels save your progress separately and they have their own rank requirements. You can also find hidden terminals around the levels with some info about the mod
Wait!
Currently the mod is in development, so only some layers are changed. I'll update it as I finish each layer:
Done (1/10)
- 0. Prelude
Upcoming (9/10)
- 1. Limbo
- 2. Lust
- 3. Gluttony
- 4. Greed
- 5. Wrath
- 6. Heresy
- 7. Violence
- 8. Fraud
- 9. Treachery
Also because of the nature of the mod, boss levels would need some special treatment so if you have ideas then dm me on discord @somebilly
if you can p rank everything in Billion Nemesis on Billion Difficulty i'll be impressed
CHANGELOG
Version 2.0.1 (2026-06-23)
- (0-1) Added a popup telling you to not use a new save
- (2-1) Maybe fixed Insurrectionists getting stuck on stairs
- The thing where electric coils would activate without the needed weapons still didn't work after trying to fix it multiple times so i'm just removing it
- (not actually relevant yet but) Fixed Fuchsias and Shockwave Shufflers acting weirdly when puppeted or radiant
- Gave Fuchsia a small telegraph before it starts firing its lasers
Version 2.0.0 (2026-06-21)
- Added Nemesis levels for Lust (2-1, 2-2, 2-3, 2-4)
- (0-1) Updated the title drop
- (0-4) Fixed 2 Streetcleaners in the last arena spawning at the same position
- (1-2) Fixed missing fire and title drop
- (1-2) Fixed a checkpoint not resetting a room
- Deathcatcher cases lose their collision when opening for convenience and to prevent possible bugs/getting stuck
- Black Hole Launcher's black hole speed now depends on difficulty
- Maybe fixed the electric coil activation if you don't have electric weapons
- Time rank requirements that appear in the console when you start a level now show time in a readable format
- Corrected the listed number of health for Black Hole Launchers in the mod description
- Removed unneeded bits of some elevator textures to reduce the size of the mod
- Added logo to the mod description
Limbo - 1.x.x (2026-05-19 to 21)
Version 1.2.0 (2026-05-21)
- If you don't have the jumpstart nailgun or electric railcannon, you can now activate tesla coils by walking into them (great news for the 3 people playing this on a fresh save)
- (0-3) Made the enemy trigger activated by the tesla coil bigger
- (1-2) Added a checkpoint in the blue skull room because i didn't know how to fix a softlock there
- (1-3) Fixed enemies in the blue skull arena getting stuck in the corner
- Reduced Black Hole Launcher health from 30 to 27
- Increased Watchtower hitbox size
- Increased Watchtower yellow orb parry damage from 10 to 12
Version 1.1.0 (2026-05-20)
- (0-1) Recolored the pit at the beginning of the level
- (0-2) Added a checkpoint at the end
- (1-1) Added a checkpoint before the final room
- (1-3) Added an extra hookpoint in a specific arena
- (1-3) Delayed spawns in the last arena
- (1-3) Fixed the rotation of torch pedestals and slightly moved an Idol in the last arena
- (1-4) V2 won't get enraged until its idol is broken
- (1-4) Fixed Virtue not enraging after you died once
- Made Watchtowers wider
Version 1.0.0 (2026-05-19)
- Added Nemesis levels for Limbo (1-1, 1-2, 1-3, 1-4)
- Added level 0-5
- The hellevator rooms are now pink
- Layers and chapters (acts) that are fully P ranked on Nemesis now also have a pink rank background
- Made some Idols spawn before the enemies they're protecting instead of after
- Powers without an intro now have a spawn effect like other enemies
- Mirror Reaper goop doesn't damage enemies
- The subtitle in 0-1 should be less broken on different resolutions
- Changed commentary 4 to mention commentary 1 instead of 2 since that was incorrect
- (0-1) Moved the fan upwards in the room before the boss
- (0-3) Made the speed of the series of beams depend on difficulty
- You can now see what's currently being loaded in the console when the game is starting
- Updated the mod description
Prelude - 0.x.x (2026-04-22 to 24)
Version 0.3.0 (2026-04-24)
- P rank backgrounds are now pink on the level end screen as well
- (0-2) Some changes in the final arena + the enemies can no longer be killed by the crushers + increased the time requirements by a bit
- (0-3) Fixed a niche softlock in the room with lots of beans
- (0-4) Made the lower ranks' kill requirements smaller, this doesn't actually affect anything because you still need to kill all enemies to beat the level but I didn't like that you stay at a D rank until the skull arenas
Version 0.2.1 (2026-04-23)
- Updated the icon
Version 0.2.0 (2026-04-23)
- (0-4) Added to the first arena and the blue skull arena, and also changed the rank requirements to account for this
- Updated the mod description to mention the secret terminals
- Fixed Powers potentially not doing anything after you die and respawn
- (0-2) Fixed the short crusher hallway not being loaded when you respawn at the checkpoint before it
- (0-4) HOPEFULLY fixed the electricity box not being breakable sometimes (you still need to kill the enemies first)
Version 0.1.2 (2026-04-22)
- (0-4) Fixed softlock
Version 0.1.1 (2026-04-22)
- (0-2) Fixed a softlock (thank you kind stranger!)
Version 0.1.0 (2026-04-22)
- Initial release (0-1, 0-2, 0-3, 0-4)
