1.A bad ass character in Mortal Kombat.

2.A bad ass Ninja in MGS4.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.

Probably one of the most infamous characters of the Metal Gear Solid series.
For obvious reasons.

Created by Hideo kojima, who wanted a young beautiful male and immortalised by Yoji Shinkawa.
Overall, he's not that bad.
But still..that leather suit is a tad tight.

1. A somewhat cool character in Mortal Kombat. The "god of thunder" ("Raiden" means "fighting thunder," or "thunderbolt," in Japanese.)

2. The player character in Metal Gear Solid 2: Sons of Liberty. No, people, Raiden was NOT the "main character". Kojima says that it was like one of those Sherlock Holmes novels: the main character is Holmes, while the narrator is his assistant, Watson. Raiden was disliked in America, due to his effeminate appearance, "gayness" (he's got a girlfriend people, wake up) and "replacing" of Snake. In actuality, quite a good character, considering being more believable than Snake, I.E. showing some personality.

Character from Metal Gear Solid 2: Sons of Liberty, Metal Gear Solid 2: Substance (special edition version of SoL) and Metal Gear Solid 4: Guns of the Patriots.

On of the most under-rated characters from a western standpoint. Hated by immature little kids who whined that he was "gay" despite having a girlfriend. Also, these people were desperate to play as the more manly Snake, which makes their sexuality questionable.

In MGS4 he's taken over the role of the game's "Cyborg Ninja", and is apparently no more than a head and spine kept alive in a special exoskeleton.

Generally he's a pretty good character. Personally, I didn't hate him at all in MGS2. I was surprised to suddenly be playing as him but I was mature enough not to throw my toys out the pram because it wasn't "my spweshial snake!"

A charcter from Metal Gear Solid 2. Not gay like all the ignorant homophobes say he is. He was designed to appeal to japanese women who like preety boy characters. Most say he's a whiner despite the fact that he doesn't whine that much. I bet if Snake was the main character and had the exact same script and story as Raiden, people would love him and praise everything about him just because he's manly. Some hate Metal Gear Solid 2 just because of Raiden, which has got to be the dumbest reason ever to hate anything.

A name that brings conflicting memories to many gamers, because it refers to

1. The most kickass Mortal Kombat character ever, but also

2. The most bitchass character ever in the Metal Gear series.