Soo here are the the gamemodes of this "game"!!!
"CPU Monsters" makes every monster controlled by a CPU, the best option for solo runs
"Full Moon" the maps start at day, where each player can hide, until it's night, and the monster is revealed, can't be played in Solo, although characters with their unlock condition being associated with this gamemode usually have alternative unlock conditions
"Boss Round" it's a boss round, meaning that only one player/bot is the monster, but they can play as an INFESTED, aka Tier 3 (Tickeds are tier 1, Overtickeds are Tier 2, INFESTEDs are Tier 3, this comes into play when selecting the quantity of monsters)
"Forever" a roguelite solo run!
"Challenges" always CPU Monsters runs, they have specific rulesets, either can be played in Solo or with friends
