I Just Installed Battlefield 2142 and when i login with my EA account, it says CD Key Invalid. How to unlock my sprint iphone 4s for free. Can Somone Help. This is a mini mod which allows you to play with the unlokable weapons in the First Strike Singleplayer mod. I havent managed to add all the weapons in a single kit so i made two additional kits that you can use by replacing the original Kitsserver.zip before you start the game. Battlefield 2142 Tweak Guide Page 9 Neat Stuff & Conclusion. The guide is fast coming to a close. The following are some tips and tricks I've found which you may find very handy, so don't skip this page. I played the Demo of 2142, didnt like it, then I went and hired the full game, still didnt like it so I didnt buy it. I prefer Battlefield 2, 98% of the time it is a good game, the other 2% is when you get the total morons playing. As far as I am aware you cannot get the upgrades in Single player mode.