sptry: I searched the web for a while but did not find a working solution.
Is there a way to play AS in a larger (especially wide screen) resolution or at least in windowed mode?
Yes, but it isn't 100% working. It's been posted
elsewhere on the internet in more detail, but I'll recap here:
1. Navigate to your Alien Shooter 2 --> Maps directory. For me this is
F:\Games\Alien Shooter 2\Maps 2. Find and open
CONST.LGC in a text editor, such as notepad.
3. Navigate to the line with the contents
static int RT_SCREEN_X[] = { 800, 1024 };. This should be line 538. You can likely get there by just searching for "1024"
4. Replace 1024 and 768 on the line directly below with your desired resolution width and height. I'd recommend common sense here (I used 1920 and 1080).
5. Save and close the file. The game should run at the specified resolution without the HUD now.
6. To fix the HUD: find "gamebar1024.men" in the same folder, and rename it "gamebarXXXX.men", where XXXX is the screen width you put in earlier (in step 4). So, for me it is now named "gamebar1920.men".
The game should run in high resolution with the HUD now. It isn't perfect; there are some panning issues and the HUD is positioned strangely, which is probably why GOG didn't release a config tool with he game. I still think it's better than nothing, though.