if you don't want to stare at stretched out pixels on your giant computer screen, then this is the guide for you.

• Go to the game's folder, most likely stored here: C:\Program Files (x86)\Steam\steamapps\common\Blackwell Legacy
  
• click windsetup.exe
  
• tick "run in a window instead of screen"
  
• change resolution by clicking on the drop down box of "Graphics Filter" and change it to x3 or x4 nearest neighbor filter.
  
• save

and then when you run the game it should look much nicer than when you opened the game up the first time, haha.