Posted by Rasheikbo
Since the unlock data isn't kept on your computer, I don't think there is a way to circumvent the level up method.
All necessary game files, even for weapons you don't have, are kept in your 2142 directory. You can edit files to allow all weapons in single player, but it will not work for multi. The only way to get the unlocks for multi is to rank up and just unlock things. And it's really easy to rank up in 2142. I had if for like 3 weeks before getting to Captain Silver