It's a fairly fast fps with terrible controls (no sensitivity adjustments, not to mention axis inversion in the demo!).
This is the part that made me stop playing the demo (I got too dizzy). The real game has inversion option though.
The boost/dodge mechanic is kind of interesting. But it's so hard to aim at anything, especially when it starts using elevation.
Am I supposed to ignore the fact that I couldn't hit anything at all, ever, if it weren't for the automatic targetting, and just focus on dodging? Is that what Armored Core is about?
I played AC2 and kinda liked it. It's more about mecha customization. Easier to beat the game if you use the "right" mecha. I completed AC2 relying on auto-tracking missiles so I don't have to aim. AC4 is similar but faster and more lenient/flexible.
I figure the full game would offer more weapon loadout options, but I don't even understand how ammo is supposed to work. During that "mini-boss fight" (mission in the desert) I ran out of some missiles, switched, ran out of the next thing, and switched back and again had missiles. Why?
I didn't play the demo long enough (only tried twice) to see this. Perhaps you're cycling through > 2 weapons (I think it was at least left arm, right arm, left shoulder, right shoulder, back)
TBH there's no way I'll ever want to play this game, just curious what this is all about. There must be something there for someone if it's in its fourth iteration already.
I liked the deep mecha customization (including painting and designing insignia).
In AC2 (and I think AC4 too), there is also the Arena mode where you fight one-to-one against a ranked list of robots. Each of them has a short back story. I enjoyed this part of the game more.
Incidentally, the #1 guy on the AC2 robot list was not the strongest. I think #40 (The allegedly weakest guy) was the meanest. It's supposed to be a retired but legendary soldier. If I remember correctly, #38 to #40 were all tougher to beat than #1.
EDIT: By default, I think you start somewhere in the middle. So most people would fight up the list (rather than down). I tried to complete the entire list and that's when I discovered the nasty mercenaries, retired warriors at the end of the list. I thought that was pretty interesting.