My guess, and this is only a guess, is that it's the second key you get so you can give it to a friend. If you look at the part where you can buy the game, it says "Includes two copies of Frozen Synapse - Send the extra copy to a friend." There is only one place where it mentions the word multiplayer: '5 challenging multiplayer modes, including the innovative bidding-based βSecureβ and βHostage Rescueβ' Nothing about that indicates you need a special key to access that mode.
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Hi everyone, I have a Frozen Synapse 'Multiplayer Key' from an old Humble Bundle (PC and Android 10), anyone knows what this is for exactly?
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