Ripping ".exe" games (QUESTION)

[gabrielwoj]

No, they aren't, as every game is different.
Game rippers are very unreliable and outdated IMO, so your best option is using an hex editor to scan the .dat file for .png or .bmp headers.
If you hit paydirt, then delete everything *before* the image header, save and open the .dat file with any image viewer program, copy the image and paste it on MSPaint.
Scan the .dat file again, and search for the next image header, then delete everything before it, save and repeat the previous steps until you get all the images on it.

Yeah, it's a long and tedious process, but it works.

However, because of the new data compression routines, sometimes even the hex editor trick fails, which really sucks.

I hope this could help you somehow.

Don't really know if there are a program which opens .dat files...
Also, hex editor is made for change codes of images and others right?
I don't get much follow what you did said, but may I give some try...
Just need an program to open dat files...
I have Irfan View and XnView...
It works?