som dumb lil mod ideas ive thought of before i wish i could create but i have practically zero coding experience and have no idea where id even actually begin
interiors:
"bracken room" interior: that one room in the default facility, but make it the whole interior, bonus points if it has a room that can only spawn once that looks like the regular interior
abandoned mall: old, abandoned, falling apart mall, the main entrance would be a similar layout to the mansion, except much bigger and with escalators, not sure if this is possible at all but if it could have little shops with corresponding scrap inside
abandoned school: ik theres already a school interior somebodies made, but ive seen a few pics of it and it looks a little too taken care of which doesnt quite fit for a abandoned moon i think
monsters:
minecraft nighttime enemies: practically just ported directly into the game, idk itd be funny and i havejt seen anyone else do this, not sure if theyd be interior or outside enemies though, also, just like you can with a nutcracker, killing a skeleton has a chance to drop its bow + some arrows, arrows would be stackable cus they wouldnt be as strong as a whole ass shotgun lmao
barnacle from hl2-esque enemy: dunno what else to say i just think this would be a really interesting enemy for the game, only concern is how youd balance this considering you cant very well deal with one without risking your life with a shovel or shooting it with a shotgun but ammo isnt quite as expendable or easy to come across in lethal as it is in half life lol
evil leafy: not sure if the overlap between object show fans and lethal company fans is very big LOL but just put evil leafy in the game, based off the like official evil leafy maze game with the black vignette effect thing everytime she moves and the sound and everything