This page is one of the worst spoilers that you could possibly imagine. It contains all four endings of Abe's Oddysee. Think one more time about looking over them.
The Saving Bonus
This screen is given when you rescue all 99 Mudokons in the game (which this walkthrough instructs how to do, by the way). You receive a bonus screen to watch all the FMV's from the game. Some guides say that some are missing from the game, but in reality, there's nothing special there.
The Good Ending
If you rescue more than 50 Mudokons, then you've landed the good ending. You get to see the credits. Woo-hoo.
The Bad Ending
If you rescued less than 50 Mudokons, you get to see this screen and restart all the way over at the beginning of Zulag 1.
The Killing Bonus
And this screen you get when you kill more than 76 Mudokons. The bonus, in my opinion, is the greatest of all. Plus, when you load into a saved file with the infinite grenades and then pick another level, you can get infinite rocks/meat/grenades there as well.