If you want to see all four endings of Dark Messiah, whether you have completed the game or not, you can head to Youtube and watch this 5:22 montage by goTha83. In the game, which movie was played was based on your actions after your encounter with the final boss and on the fate of the female characters -- you could watch those movies by opening the proper files with a tird party application, but for some reason I didn't have sound. While the animations are great, all four segments are similar and reuse the same shots, something that many players found disappoiting. There is also a complete video walkthrough of the game, played on hard, in this playlist.

Speaking of Dark Messiah, the game can now be picked up on eBay for a dollar or less. Be very careful with shipping costs (around 6 dollars for domestic shipping), and stick to sellers with high feedback scores as much as possible.