Two of the three endings of R-TYPE Final.
The first ending is the "proper" ending of the game, in which you finally destroy the Bydo Empire. After flying through the most disturbing level in any retail shooter ever (except maybe Cho Aniki, which doesn't count), you have to fling the Force - your power-up sphere that is the main weapon of the R-TYPE series - into the Bydo Core, then blast it a bit, and then, while dodging flying Force spheres, hold the square button until your weapon's now-cracked charge meter is flashing the word "FINAL" - about 45 seconds, which normally doesn't seem like a long time, but feels like an eternity here. The two seconds following the release of that button are simultaneously the most awesome display of power by a player character in any shmup ever and the end of the God-forsaken Bydo Empire (R-TYPE Command doesn't go against the second part of that statement because it's a prequel).
In the stage before the second ending, you appear in a spinning room with a monster that drops polyhedrons and fires at you and stuff. All you have to do is destroy the monster. However, the cutscene and the stage that follows are the largest shift in any shmup I've ever played. Spoilers below for anyone who doesn't care enough to play the game themselves...
At the beginning of the stage, you fly through the front wall of the previous stage, where you transformed into a Bydo ship. You must destroy ships from no less than seven series used in Operation: Last Dance, finishing with a single R9-A, who steals your Force halfway through the battle.
Unfortunately, the third ending isn't nearly as epic as either of the other two, unless you're talking about difficulty - it's an endurance run, in which you get cast forward into the 26th century (when the Bydo were created) and have a single chance to fight your way back to your own time.
Also, every stage of SPAC3 INVADERS EXTR3ME. You guys should've bought this game back in June (or earlier, if imports are your thing), so I'm not going to explain it.