I posted these questions in another thread but this thread may be more appropriate for them.
1) How do you upgrade turrets and sentry guns past the first level? I have level 2 skill in each yet when I try to upgrade them it says "upgrade locked". Do I need to level the abilities up more or is it not available until after a certain Horde wave?
2) There is a medal for "founding a COG base" or some such. How is this earned? I've tested it and when I establish a first base or a second base after the game has started, neither condition seems to award the medal...