When you hit the 5 item chest in Vampire Survivors

Vampire Survivors is a time survival game with minimalistic gameplay and roguelite elements. There's no place where to hide, all you can do is try to survive a cursed night and get as much gold as possible for the next survivor, before Death inevitably puts an end to your struggles.

A Treasure Chest is an item dropped by bosses, which has a chance to give 1, 3 or 5 items. All items dropped will be upgrades of any weapons or passive items the player has in their inventory at the time that they open the chest, unless the requirements for an evolution (or union) are fulfilled. If so, and the run is 10 or more minutes (or the chest dropped from Mad Forest's first elite bat, or it's from Dairy Plant,) the chest will drop the evolved (or unified) weapon. If all items are at max level, then each item is replaced with 25 of the in game money. The Treasure Chest will also randomize the amount of in game money the player will receive, which is normally around 150, but this number grows based on how many items you received in said chest.