The end credits color and style (green computer text on black) are the same as the display of "Mother," the onboard computer in "Alien," right down to the underlining of important text (in this case, the department titles).
The opening titles and closing cast/crew credits first appear in the Predators' red digital alphabet (as seen on their self-destruct devices) before being translated into English.
If you listen very carefully during the end-credits, you can hear the signature clicking-rasps of the Predators, and the iconic hiss of the Alien Warrior subltly interjected into the musical score.
Since the film has no opening credits, the end credits begin with an extended primary credits sequence. This sequence is shown over close-ups of various aspects of the Predator pyramid interior.
There are no opening credits, just a title.