In Risk of Rain 2, Events have a random chance to occur every time the player enters a stage. These are currently limited to restricting the stage to one particular enemy type. If such an event occurs, the player will be greeted with a corresponding text message in the chat.
Event types[]
[WARNING] The ground begins to shift beneath you...
Only Beetles, Beetle Guards and Beetle Queens will spawn.
[WARNING] The ground's temperature begins to rise...
Only Lemurians and Elder Lemurians will spawn.
[WARNING] The air begins to burn...
Only Lesser and Greater Wisps spawn, with Greater Wisps or Grovetender serving as the boss.
[WARNING] The earth rumbles and groans with mysterious energies...
Only Stone Golems and Stone Titans will spawn.
[WARNING] A tear in the fabric of the universe...
Only Imps and Imp Overlords will spawn.
[WARNING] The Air Crackles and Arcs...
Only Jellyfish and the Wandering Vagrant will spawn.
[WARNING] The earth shifts and changes...
Only Parents will spawn
[WARNING] The bulwark begin to falter..
Only Lunar Chimera (Golem) and Lunar Chimera (Wisp) will spawn.
[WARNING] The void has become curious
only void jailers, void reavers, void barnacles, and void devastators will spawn.
[WARNING] The air smells of sweet strawberries.
Only Gup will spawn.