The demo for Dark Forces consists of the first mission of the game, in which you steal the plans for the Death Star, along with the opening and trailing cutscenes.
Running the demo is easy enough on Mac or Windows using DOSBOX.
The files here are linked from The Internet Archive.
- dforces1.zip (3.2M) - This is the actual demo, and the only file you need to get in order to play.
- dforces2.zip (1.1M) - The opening cutscene, including the classic Star Wars text crawl. This is optional.
- dforces3.zip (5.6M) - The cutscene that follows the first mission and sets up the story for the rest of the game. This is also optional.