There's nothing inappropriate about hoopblah's comment, but that doesn't stop me from disagreeing with him. I personally think the varied gains and losses in score that come from varied scores is enough.
@Sooner: This game has high replayabilityness. If you invest in this game, and enjoy it, the hard achievement will feel like a bonus to your efforts. If you don't enjoy it, and play just for the achievements, don't even bother.
@Valentyne: That's not a surprise. Although, people without a fire wall can either put up a phase shield (any shield works, but phase shield works great) or just destroy the enemy's hp.
Here's a jealous bomb for you newbs:
First, I was fighting a level 3, and doing lots of damage. I was one turn from killing him, and he used Miracle. (which fyi heals you to 99hp) Okay, so I land a 45-damager on him twice. He uses Miracle AGAIN. I then land a 46-damager on him, then the next turn I use lightning and then finish him off. But that's not all. From the slots I got 2- mind you, TWO, Miracles. All from the same game. Ftw.
Chapter 4 is EASY. Just get out of range of the spiders after you end your turn, and if they enter your flak's or annihilator's range, kill it. Bring your scorpion, mortar, and rocket truck through the mountains and through the blockades. Honestly, I beat it on first try.
MGKGT, I am led to believe Mullen either got killed before Durand came to the rescue or captured onto the escape airships when Durand's stealth tanks came, both in the last campaign.
This isn't a short and hard escape game. It's long but also fun and challenging. The Radio is awesome- it gives you tips, enough for me to play the game without any walkthrough whatsoever. The art is nicely done (besides hanging that doll on that control panel, lol), and the humor is amusing- that is, if you are 13+. Great game, 5/5!