Into the freyG 5

For completing the first area. Can be done on any difficulty, and consists of 7 levels. Zombie level doesn't count for this. Most levels are quite easy, but the timed one can be a little challenging. You can buy some drops to make it easier, and focus on the objective for the timed one. Once the main objective is done, the timer stops and you can then take your time collecting stuff or killing remaining enemies.

Into the frey G5:
You have completed Operation 1.

You will unlock this after completing the first 7 levels, not including boot camp. The first chapter is pretty easy though. You shouldn't have trouble with it. If you are having trouble, make sure you are upgrading your troops when you can, and don't be afraid to use consumables. The rockets in this game can take out a vehicle in one shot. I find that one of the most useful things in the game is the Intel pack. I recommend buying it every level, except for the first level, since the map is so small, survival levels, and levels which you are mounted on a vehicle. Good luck ! ! !