Each character is allotted a certain number of action points depending on how tired they are, how many wounds they have, and how strong they are. Every time you want a character to move, fire a gun, reload, or even crouch, you must pay a certain number of action points. Everything you do costs points, so it's important to plan how you spend them, as you may be caught short and left in a vulnerable position. As I said before, if you just rush in, you will be shredded to bits. It's important to use cover and stealth to surprise the enemy and keep your soldiers alive.
Money is so limited, losing a merc early on can be disastrous.
The game's graphics are pretty nice. The game is rendered in an isometric 3D view with 2D sprites representing the characters and enemies. The sprites are nice enough, as they faithfully render the weapon the character is carrying, but it would have been nice to see the body armor and helmets rendered as well. One area in which the animation shines is the representation of wounds. At first, your character will just shrug them off, but as he gets more damaged, he will start limping along and leaving a trail of blood in his wake.