"Separate Ways (Worlds Apart)", a song that is much darker than the band's more famous output, and awesome because of it.
A lot of their Arnel Pineda Era output is pretty awesome as well. "Change for the Better", "Faith in the Heartland", "Tantra", "Human Feel", "Someone", the list goes on...
Beam Me Up, Scotty!: Perry never said "I never felt part of the band". He really said All these years, its funnyI never really felt part of it. Even then, the line was actually taken out of context by VH1. What he really said was that he felt he wasn't part of the band at the time (he was talking about his early years with Journey).
Broken Base: Fans of Steve Perry vs. fans of the Steve-Augeri/Arnel-Pineda eras. The fanbase shattered the moment the band announced they were replacing Steve Perry with Steve Augeri. The hostility got so bad that Journey had to shut down their official forum, many fan-run Journey boards still ban any "Perry vs anyone" topics, and fan-run Perry boards are still full of hostile rants against post-Perry Journey. Flamewars and overheated arguments erupt regularly between the two camps to this day, over twenty-five years since Perry left the band.
Colbert Bump: The use of "Don't Stop Believing" in the final scene of The Sopranos instantly made the band a trendy discussion topic again. And then it happened again in the pilot of Glee, which boosted the song to the number one iTunes download.
Ending Fatigue: "Lovin' Touchin' Squeezin'". The song repeats the same "Na na na" chorus over. And over. And over. Good God, end it already.
Epic Riff: The keyboard riffs for "Don't Stop Believin'" and "Separate Ways".
Face of the Band: Steve Perry, who was hired because the record company felt that Gregg Rolie wasn't distinctive enough and the band needed a clear front-man. Even after Perry left the band, he is still the member who is most associated with the band.
Germans Love David Hasselhoff: The band is currently far more popular in Europe than in the US, to the point that their 2011 tour only has 3 US dates, with all the rest being in Europe. This is a relatively new development. In the eighties, Journey toured almost exclusively in USA and Japan. The European AOR fans preferred Toto (still do, really).
Hype Backlash: Some people feel that "Don't Stop Believin'" has become so overplayed that it's overshadowing the rest of the band's just as great music catalog.
Memetic Mutation: It is obligatory that most covers of "Separate Ways (Worlds Apart)" will include a shot-by-shot copy of its Narm Charm music video. See here and here for examples.
Misattributed Song: Some people confuse this band with Foreigner and misattribute songs like "Jukebox Hero" and "I Want to Know What Love Is" to this band. Ditto Survivor's "Can't Hold Back", to the point that Survivor's lead singer was actively imitating Steve Perry.
Never Live It Down: Although Jonathan Cain was reportedly upset when Beavis And Butthead tore into the much-derided "Separate Ways" video (a staple of the early years of MTV), he has since admitted to being embarrassed by it. In I Want My MTV: The Uncensored Story of the Music Video Revolution, he said, "I'm at a loss to explain that video. I will never live down those air keyboards. No matter what else I've done in my career, sooner or later people find a way to ask me about the 'Separate Ways' video." (However, The Music Video Showexplains that the video is So Okay, It's Average.)
Signature Song: "Don't Stop Believin'", without a doubt. It's the one song the band always plays in concert and is a guaranteed singalong, the one song everyone recognizes as Journey, and gets the most airplay out of the band's catalog.
Wangst: Steve Perry's "I never felt part of the band" line comes off as this. At least until it was revealed that it was taken out of context (see Beam Me Up, Scotty!).
Awesome Music: Yes, it's good enough to stand on the same page as the band Journey. It plays on a recurring motif that can be heard in its simplest form in "Nascence", the first song, and at its most awe-inspiring in "Apotheosis", the very last song.
While all the music you hear throughout is amazing, the ending credits song "I Was Born For This" just tops them all. You can listen to it here.
Breather Level: The Temple is a perfectly safe location wedged in-between two patrolled by the War Machines. Not to mention that it is literally overflowing with energy.
Catharsis Factor: The makers of the game specifically said that they set themselves the challenge of crafting a game that was capable of generating catharsis.
Goddamned Bats: The flying war machines. They can knock you miles away when you're trying to go somewhere else.
Hype Backlash: Its winning of several major game of the year awards has not been met with blanket enthusiasm. Many commenters are accusing the writers of pandering to gaming hipsters and bringing up the It's Short, So It Sucks! arguments.
Nightmare Fuel: For a game that up until that point is nothing but pleasant, the war machines making their first appearance by bursting out of the sand completely without any warning is responsible for quite a few pairs of soiled pants. And the subsequent stealth-sections are almost worse. It's even worse because their eyes look like the little symbols that make your scarf longer from a distance, and if you run towards them and don't realize what they are until it's too late there's no time for you to get away.
It can also be upsetting when you have a companion that is spotted by the war machines, because once they find your friend, the only thing you can do is watch in horror as they are attacked. That's right, you have no way to help your friend.
That One Achievement: The "Companion" achievement requires playing through most of the game with the same companion, "most" in this context meaning at least from the Underground Passage to the end. The game is short enough to pull this off easily if you get a companion that sticks around, but the co-op system leaves no way to coordinate this and you have no guarantee that the other player will be able to stick around.