This started off as a pretty solid Free-to-Play game!
-No special tricks with the interface. Point to the one of the two actions that you want to do (move, shoot), confirm, execute.
-Simple damage and cover mechanics.
-The more you upgrade, the more you die.
-Want any "meaningful" upgrades? It's no longer a "Free-to-Play"
-String of repetitive campaign maps with no real story or purpose linking them together.
Description of my experience:
Loaded up my two-man team, killed a few enemy, got some upgrades, and "proceeded to die in a loud, groutesque, military manner" (name that movie).
For just about every worthwhile upgrade, you'll pay actual money. This isn't like most F2P games where if you're willing, you'll have to grind about ten times as long to earn upgrades. Nope, that option isn't even available.
The other thing that is pretty irksome is the fact that you will NEVER outgun your enemy. I upgraded my free chap with a rifle. So did the enemy, and he brought two friends.
I upgraded my second free chap with a machine gun... yep, you guessed it! The enemy upgraded too, and brought more of his friends! By the way, the extra kit that your guys carry it slows them down, but it does not slow down the enemy. The more you upgrade, the more you'll die.
It's a shame. I think I would have gotten a few more hours out of this one.