Guys, I have a problem with game lagging, and I don't know why it is.

It used to work well when I played it with a different Windows compatibility, but now it just lags for no reason.

Here are my System Specs:

Lenovo T60p laptop

Microsoft Windows XP
Professional
Version 2002
Service Pack 3

Intel(R) Core(TM)2 CPU
T7600 @2.33GHz
2.33GHz, 3.00 GB of RAM

And my display driver is ATI MOBILITY FireGL V5250

I have updated the drivers with Driver Hound recently (though with some side effects). I have the game on my external hard drive. All the other games from GOG.com play well, except for Giants. I used the latest patch from the Giants WD fansite, but it still lags whenever I and my fellow Mecc NPCs shoot. Isn't there a configuration file I can access to determine what is wrong? As I said before, I've tried compatibility options, but that hasn't helped.

First, download and install the last Patch for Giants : Citizen Kabuto on giantswd.org

Then launch the game and disable Objects and Landscape Bumpmapping Effects in Graphics Options or else a strange graphical bug will appear (invisible landscape).

It worked for me, no more lagging !