If you want to unlock Endless Mode in Vampire Survivors, there are certain steps that you will have to follow in order to gain access to it, but once you have it, you will be able to fight wave after wave of enemies in the game. Here is how you can unlock Endless Mode in Vampire Survivors.
How to unlock Endless Mode in Vampire Survivors

To access Endless Mode, you will have to have the final stage unlocked. This is called Eudaimonia Machine. You have to collect every relic except Gracia’s Mirror and Seventh Trumpet. This will unlock the final stage.
Once you enter the final stage for the first time, you will meet a Mysterious Entity, and they will ask whether your experience has been too easy or too hard. You will need to respond with “Too Hard” in order to unlock Endless Mode. This will also unlock the Seventh Trumpet relic.
When playing in Endless Mode, once the clock reaches thirty minutes, it will reset and go back to zero. This marks the completion of one cycle. As this happens, the enemy’s health increases by 100%, damage by 25%, and the amount by 50%. The player’s health also decreases by one per cycle.
How to quit Endless Mode in Vampire Survivors

Quitting Endless Mode in Vampire Survivors is simple. All you have to do is go to the Options menu and quit there. You will lose the gold that you made during the run, but you will keep any progress you made towards achievements or any achievements you may have earned during that run.
That’s everything you need to know about the Endless Mode in Vampire Survivors.
For more guides on Vampire Survivors, keep reading The Games Cabin.