Armored Core 2

The Good
What's great about this is that you can customize your AC with hundreds of parts. There are 50 missions altogether, and 54 AC pilots you can challenge.

The Bad
Paying for ammo and repairs in almost all missions. No damage effects, and you have one way to melee attack.

The Bottom Line
If you feel like blowing up stuff, have a challenge when fighting other ACs, and have time on your hands, Armored Core 2 is just for you.