What in-app or in-game purchases are offered in your product?

The Premium Pack is the only in-app purchase. It unlocks all character customization options, as well as all gameplay options in the game's maps, such as alarms, teleporters... Only one player with the Premium Pack is necessary in a game for all players to play on maps with those gameplay features.

Can your product be used without making any in-app purchases?

Absolutely. You will have access to a few customization options for your character, as well as the base maps gameplay elements. You can also join a player with the Premium Pack to play with them on maps with Premium gameplay elements.

Are in-app purchases refundable?

No.

What payment platform is used to facilitate these purchases? Do you use Epic Games’ platform or a 3rd-party (including your own) payment system?

Epic Games's platform