Mega Man X5 is the fifth entry in the Mega Man X series, released on the Playstation on November 2000 in Japan, February 2001 in North America, and August 2001 in Europe. It was orignally intended as the series finale, but this never came to pass.In the year 21XX, several months after the Repliforce war, Earth is enjoying a time of peace, repairing the damage caused by the war, including several major space colonies that were damaged, including the giant space colony of Eurasia. However, before repairs could be started on Eurasia, a mysterious figured comendeered the damaged colony, infecting it with the Sigma virus and setting it on a collision course with the planet, threatening to wipe out all life, human and reploid alike, off the face of the Earth.With only 16 hours until global devastation, X and Zero of the Maverick Hunters must quickly form a plan to save the planet from disaster. They quickly decide upon two plans, the main plan where they outfit an aging supercannon at the Maverick Base to destroy the Eurasia colony, and a backup plan, in which they need to repair a shuttle to collide with the colony before it hits the Earth. With time quickly running out, the two decide the split up and collect the parts for both plans, the world's fate in their hands.Bosses/Mavericks:
Axle the Red brings up the Repliforce incident as well, when he accuses Zero and the Maverick Hunters of unlawfully classifying innocent reploids as Mavericks.
Squid Adler is a retired member of the Maverick Hunters, and had a close connection with "Octopardo" (Launch Octopus).
Dark Dizzy was built by Sigma to be a part of his Maverick army, before he defected and went into hiding. As a result, he is the only boss to have the classic Sigma insignia under his lifebar, as opposed to the skull the other bosses use.
Sigma's final battle body has several design elements similar to Gamma from Mega Man 3, especially the arms. This crosses into Fridge Brilliance territory when you take into consideration it was Dr. Wily who made this body.
Damage-Sponge Boss: The endgame rematches with the eight Mavericks turns them into this, giving them health bars that extend almost the entire length of the screen, so that it takes a while even if you're using their weakness against them.
Freeze-Frame Bonus: During the X vs. Zero battle, the winning combatant remarks that they didn't expect the loser to use Soul Bodyas a final attack and then collapses from their injuries. If you squint, you'll see X/Zero actually send out Soul Body to attack the player right at the end of the usual explosion that signifies a defeated boss.
Being infected by The Virus causes X to constantly take damage for a time. Zero becomes invulnerable.
This is given further backing in the battle with Maverick Zero, who, if not defeated in a certain amount of time, becomes invincible and starts spamming Genmurei.
At the start, the player has to choose which character to use for the first level: either X or Zero. Choosing one will have a bonus in that character's abilities (the Force/Fourth Armor or the Z-buster, respectively). The other bonus will not be available for the rest of the game, on account of being severely damaged by Sigma prior to the first Boss battle.
Fail to stop the Colony Drop, and Zero will "awaken" and will be unavailable for the rest of the game.
Dark Dizzy is a reploid created by Sigma for his Maverick army, but defected from Sigma and ran away. As a result, Dark Dizzy is the only one of the eight bosses to have a Sigma insignia under his lifebar.
I Let You Win: It turns out that Sigma allowed the heroes to defeat him in the intro stage, which triggers the Colony Drop.
Life Drain: Dark Dizzy can latch onto the player character and take away his health akin to a vampire.
Luck-Based Mission: The whole game (or at least the "destroying Eurasia" part) can count as this - You can try using the Enigma cannon from the very start and it still has a chance of success; conversely, even if you collect all the parts for the Shuttle, it may still fail.
Multiple Endings: The second time for the series (the first was X3.) It all depends on whether you managed to destroy Eurasia or not:
If you do, then the ending depends on who you're playing as for the final level, X or Zero.
If you don't, then Zero will be unusable for the rest of the game.
One To Million To One: Dark Dizzy is introduced this way: Multiple bat drones congregate altogether and then goes away, revealing him.
Rank Inflation: Dynamo was actually a GA-ranked Maverick Hunter, one rank above Zero. That (and the fact that he sabotaged Eurasia by himself) doesn't help him much in the boss battle, however.
Ramming Always Works: When the Enigma laser cannon fails, their next plan of destroying Eurasia was using a manned space shuttle with Zero piloting it as a last resort. Subverted that it doesn't always work (sometimes even if you managed to get all the needed parts in time).
Also a favorite attack for The Skiver and Mattrex.
Red Right Hand: More like "Red Left Claw" but Grizzly Slash is equipped with one that can turn into a drill.
The Remnant: The Skiver and Mattrex were affiliated with Repliforce from X4. Likewise Dark Dizzy was one of Sigma's forces but then hid himself.
And it's Sigma, of all people, who is fought in the opening stage this time. Of course, Sigma then later comes back as the Final Boss as usual.
And the boss of the tutorial stage is Magma Dragoon, who was That One Boss in the previous game. Thankfully, he was toned down a lot since then.
Grizzly Slash is the first boss offered in the stage line-up, and usually recommended to be fought first. He is also the easiest of the eight Mavericks to defeat, and gives Zero one of his most valuable attacks.
What Happened to the Mouse?: Dynamo was built up as a formidable opponent since the start of the game, acting as Sigma's new Dragon, being the one responsible for infecting Eurasia and causing it to crash to the planet, and personally challenging the Maverick Hunters at their own HQ twice to slow them down. However, once the final levels start, Dynamo mysteriously disappears from the plot. He does end up making a return in Mega Man X6, but as this was originally intended to be the Series Finale it's still a bit glaring how he's just suddenly dropped from the story.
You Have 48 Hours: X and Zero have just 16 hours to stop Eurasia from crashing into the planet.