lol, what are you confused about??? it's a file name given by the developers, they can name it whatever they want. You haven't even tried to start the game, and you're already jumping to conclusions that we uploaded a FAKE FILE??? so if you buy the game from steam, and when you download it, the file is also named "defiant immortals", can you sue the developers and steam?
Maybe this type of thing isn't for you... devs name their development project early on before they have finalized a name and that ends up as the name of the EXE... it is OFTEN different than the final name of the game.
https://www.youtube.com/watch?v=fk66VVTx6Ps
Dawn of Defiance Open World Survival Gameplay