Mobile collab events are a dime a dozen these days, particularly in the gacha universe. But, it’s rare that we get one as exciting as Last Fortress: Underground’s first ever collab.

That’s right: Last Fortress: Underground will host a crossover event with none other than Amazon’s dark superhero series, The Boys. This team up will see fan favourites Hughie, Butcher, and Starlight join the Last Fortress cast.

Starlight will make an appearance first. In anticipation of the crossover, Last Fortress: Underground will host a warm-up event, which features a series of objectives that you have to complete. Do so, and you unlock Starlight.

Then, as the collab officially kicks off, Hughie and Butcher will join the frey as unlockable characters in the gacha system. We wish you the best of luck in unlocking them!

You can also battle through a new storyline, which sees you teaming up with Hughie, Butcher, and Starlight to tackle the zombie threat. Who knows, you might even figure out how the whole thing started in the first place.

Wrapping up the event are a variety of The Boys themed cosmetics. This includes Butcher’s vehicle, profile customisations, and themed buildings. You can find all information you could ever want about the event in a custom collection room too.

For those unaware, Last Fortress: Underground is a mobile zombie survival game that sees you heading deep underground to escape the menacing undead.

You construct buildings that provide you with vital resources to help you survive, and recruit survivors to help you. Heading out into the wasteland itself is also essential, as you need to gather resources. So, put together a party of survivors and send them out there.

Got friends who also play? Well, it’s time to forge an alliance with them. This allows you to help each other speed up construction and research projects, as well as battle zombies together.

Whether you’re a lapsed or newly-intrigued player, we recommend heading on over to the App Store or Google Play right now to check out Last Fortress: Underground. Now’s the best time with The Boys collab starting soon.