The new Vampire Survivors DLC, Operation Guns, includes 11 new weapons, which means there are 11 more weapon evolutions to discover. Evolving your weapons, just like in the base game, transforms them into a more powerful version with added effects.

Here’s the full list of weapons in Vampires Survivors: Operation Guns DLC, how to evolve them, and their effects. All weapon evolutions require you to obtain the new Weapon Power-Up item and have both components at level eight. The Weapon Power-Up is a requirement for upgrading the weapon that will evolve, and this happens randomly. This means that even if you have all three components, you may not get a weapon evolution from a chest if the Weapon Power-Up didn’t upgrade the one you need.

The only guaranteed way to get the Weapon Power-Up to evolve your Operation Guns weapons is to find them on the floor around the maps. Chapter four, Operation: Gun City, has the most Weapon Power-Ups on the floor (three in total). So, if you want to unlock these weapons as quickly as possible, your best bet is on this map, though it may take a while to get there since you'll need to clear previous chapters first.

You can also get Weapon Power-Ups as a level-up item, although I found them to be rare. I still highly recommend opening your map and looking for a steel purse icon and heading that way, as that's where you'll find this item.