Accidental Aiming Skills: How he once managed to chop off the head of a man with one swipe of an axe while flying out of his chair in fright.
Achievements in Ignorance: More then once has managed to win a difficult section by merely doing a stupid thing, that ended up being both smart, and crazy.
Hilariously his Outlast videos are a example. Early on he accidentally exited his Locker while a enemy was right in front of it with his back turned. Pewdie quickly hid in the one next to it, only for the enemy to check the locker he was originally in.
Aerith and Bob: His Mooks in Pulse: Jennifer, Lisa, Marcus, Annabelle... then Bengt and Fuckface.
Alas, Poor Scrappy: Happened in-universe with Duck in the Walking Dead. Despite constantly hating on the character and showing visible disappointment when he wasn't killed on two occasions, Pewdie made it clear that he didn't want to shoot the infected Duck, showing surprise that he wasn't happy to see the kid die.
Pewds: I'll let you be Robin next time. I'll let you be Robin.
All Love Is Unrequited: Neither Jennifer or Piggeh get the love they want from Pewdie, no matter how often they try.
All Men Are Perverts: Stephano once slept with a Bro's girlfriend, Pewdie admires the asses of the grunts as well as the "assets" of any female he comes across, and Piggeh often tries to seduce Pew.
Amusing Injuries: His tendency to kick his table when he gets scared. Most notably when reading the story of the Bong Cheong Dong ghost.
Arson, Murder, and Jaywalking: In his Trials Evolution video, he begins to wonder what the point of some things are, gradually escalating until he begins to question the meaning of life...and then he questions the meaning of vegetables, since they taste like shit.
Artifact Title: He frequently lampshades how much he doesn't release Fridays with PewDiePie videos on actual Fridays.
Atomic F-Bomb: In episode 27 of his Calling playthrough, after a botched attempt to teleport to the basement using Hina's cell phone.
"AHH! NO I'm sorry I didn't mean to do it! Please don't kill me! NO NO NO AH NEJ NEJ AHH NOO NOOOOOOOOOO I DIDN'T SAAAAAVE FUUUUUUUUUUUUUUUUCK!!!"
Audience Participation: Pewdiepie loves interacting with fans and sometimes asks the viewers what he should do next in games that give him choices. During his Dark Souls playthrough he even asked fans in the comments for hints or tips to help him progress through the Nintendo Hard game.
Ax-Crazy: When the game he plays allows him to be insane(r), he will try it out. Taken literally with his Condemned LP and the fire axe.
In his walkthrough of The Walking Dead, he becomes very attached to and protective of Clementine, the little girl the player character takes in. Her being in danger often gets always gets a spazy scream out of Pewds. He also gets very attached to Ellie from the Last of Us.
Happened while playing "Limbo", when he thought in the end that he had gone to where he started from and thought he'd have to do it all again. Luckily, he didn't.
Occurs in "Ikenie No Yoru: Night of the Sacrifice", when the yellow character which Pewds named Stephanie (because she resembles Stephano) jumps off a cliff, killing herself. Pewds is heartbroken at this.
He lets out a very prolonged one in Corpse Party when he discovers that Mayu has been smashed against the wall and turned into a shapeless pile of gibs.
He dropped many of these during the Ao Oni playthrough whenever he managed to escape from the titular Oni.
Subverted at one point in the same walkthrough, when he's hidden behind a chair and thinks that the Oni has disappeared. He raises his arms up and begins to shout "YES", only for another one to blast through the closet and start the chase again.
The Italian spoken at the menuscreen in the playthrough of Afraid Of Monsters. Pewdie didn't know what was said either.
Anytime he finds Martin or a POLISBILnote police car, he will speak Swedish.
Sometimes he curses in Italian, like in the first episode of the Unfair Mario playthrough and in his Get On Top video, where he said "Vaffanculo" ("fuck you") a few times, and often curses in Swedish when exasperated.
Bittersweet Ending: His Journey playthrough. Part four (the penultimate episode) has a jarring Downer Ending when Pewdie's accomplice Bengt freezes to death on the mountain, but part five concludes the series with bucketfuls of Sweet Dreams Fuel, and Pewdie manages to complete the game for Bengt.
Black Comedy: He tends to lapse into this at frequent intervals.
Cloud Cuckoo Lander: Pewdie invokes this heavily, whenever he isn't in the company of one of his many "friends."
Pewdie: Don't be hating, I'm a fucking unicorn.
Its been shown that, despite Marzia (Cutie Pie, his girlfriend) has acted as the "straight girl" when both play a videogame, she's more likely to fall into this territory.
Cluster F-Bomb: Used liberally when being chased. He's also been swearing more in Swedish lately, using curses like "Fan!" ("Fuck", literally "The Devil") and "Helvete!" ("Goddamnit", literally "Hell").
During the final half of his Cat Mario 3 LP. What makes it funnier is that it starts after he had promised not to swear.
Crossover: Pewdie played Dead Island together with Morfar, another Swedish Let's Player with a similar fan-artistic, yet smaller, fanbase. He also played the Co-op mode of Cry of Fear and is playing an ARMA mod called DayZ together with Cry, aka Chaotic Monki. Recently, Pewds did the co-op of Survivors with Ken aka Cinnamon Toast Ken and played GTAIV with Ian and Anthony from Smosh.
D through F
A Date with Rosie Palms: The scenario in his Babysitter Bloodbath video where he ends up having to press a key with rapid succession, which (on camera) makes it look a lot like he's beating off.
Doesn't help that he gets gradually faster each time, to the point where the camera starts trembling.
One jumpscare in Ao Oni had him jumping in fright, alt-tabbing out of the game, revealing the walkthrough he was using.
In general, jump scares leave his leg in pain a lot, especially in the reading of Bongcheon Dong Ghost were he had to get a pillow in case another jump scare happened during the reading. He was right.
In general, first person jump scares is something Pewdie is terrible at, but even moreso First Person Platform Jumping. Once, he wound up hitting the "record" button by mistake as a result, which meant about a minute of game footage wasn't recorded (his webcam, however, was still on).
Famous Last Words: Captioned when Pewdie says "Please don't find me" while playing Amnesia: Killings in Altstadt.
Fan Community Nickname: Literally, his fans are known as "Bros", sharing the same name as the nicknamed Amnesia enemies. He also tend to call the skullhand from Afraid Of Monsters "Ruben", and then there's all the other characters he's made up.
Fan Disservice: His LET ME BE YOUR HERO! video. It's just Pewdie singing a cover of Enrique Iglesias' "Hero" while walking around and skipping stones—as well as groping, licking, and caressing his sex toy named Jerry. It gets kind of hard to watch.
His Harlem Shake video, which featured him dancing in women's underwear. Through the underwear, his penis was rather...er...noticeable◊ in the original video (which got flagged), so he had to re-upload it with a big censor on the spot.
Filler: Often, when he plays an Amnesia mod that is short in time length, Pewds would play another Amnesia mod, or, on one occasion, plays another horror game.
Similarly, in his playthrough of Slender: The Arrival, he pronounces PFD to stand for "PewDiePie's Fucking Dick".
Additionally, in his playthrough of The Crooked Man, he pronounces AED to stand for "Angry Evil Dick".
Fun with Subtitles: He'll usually subtitle his Swedish swears into English, and add little comments when something doesn't make sense. His early montage videos wrote what he and his characters said, but sometimes replaced words with images and punctuated with emoticons.
Genre Savvy: Pewdie can generally predict certain twists in stories, such as Takuro actually being a traitor after having miraculously escaped the Oni. He's also this way about his fans' behavior in response to his actions, stating that he'll get "fifty-million comments about it" when he forgets the name of a game in his Shadow of the Colossus walkthrough.
Gilligan Cut: After recieving a ceramic barrel and a ceramic Slender Man, he tries standing Slendy upright in the barrel. One cut later, and Slendy's head first instead.
Glad-to-Be-Alive Sex: Pewdie wanted to make babies with Stephano after surviving House of Creeps 3. Stephano reacted with disgust and anger... but after 15 seconds he said the exact same thing to Pewdie.
Gratuitous Foreign Language: Has a habit of slipping back into Swedish and, oddly enough, Spanish, French or Italian. Despite this, in his Swedish commentary of Happy Wheels, Pewdie slips some English words in by accident several times.
Horny Vikings: Invoked in one Friday With Pewdiepie episode, when he acknowledged that he had been nominated for King of the Web.
Hypocritical Humor: During the third part of the Fahrenheit Let's Play, PewDie has the choice of saving a little boy or letting him drown. Pewdie comments that "I can't kill an innocent little boy." Cue a clip of one of his Happy Wheels playthroughs...
Iconic Item: His Razer Kraken Pro headphones (used to frequently wear green, now wears pink).
Interspecies Romance: Piggeh wants some with Pewdie, but so far has only enjoyed the company of everything but Pewdie.
Pewds: "Deal or no deal?" How is there a correct fucking answer to a fucking dick? "Deal" rhymes with "seal", and seal doesn't have a deal. And the people who don't have a deal, are usually...not a seal. (clicks "no seal"; wrong answer)
Knife Nut: This is what happens when any game decides to give him a knife.
YOU SPEAK CHOPNESE!?
Lampshade Hanging: The ending of the first episode of his Conker's Bad Fur Day LP has Pewdie inviting Conker to do the outro. Pewdie then lampshades that he's voicing Conker doing the outro, claiming he's trying to be funny.
Leave the Camera Running: At the end of episode 8 of Shadow of the Colussus, after doing his sign off, Pewdie gets pranked by his girlfriend.
Lecherous Licking: He does it a lot. Taken to disturbing extents in "LET ME BE YOUR HERO!".
Left It In: He has a habit of saying things like "Pewds of the future, edit this part out", or some variation, usually after messing up or saying something bad.
Lucky Translation: The statues have been known to shout "Hallo!", which means "hello" in German. It's pronounced almost exactly like the Swedish "Hallå!", which has the same meaning. What makes this so lucky is that during one of these custom stories, he promised to speak only in Swedish!
Manly Tears: Pewds cries on-camera for the first time during one of the particularly heart-wrenching moments during his walkthrough of The Walking Dead. The second time he cries, during the same walkthrough, he actually has to look away from the camera.
Disguised fake Pewds tries to poison Pewds 1 in cinnamon challenge. Disguised fake Pewds is actually Hitler Pewds PLOT TWIST Hitler Pewds tries to finish Pewds 1 off. Pewds 1 escapes without Hitler Pewds notices by replacing himself with Ragdoll Jerry. Hitler Pewds gets shot by Pewds 1. Hitler Pewds is actually in love with Ragdoll Jerry PLOT TWIST. Pewds 1 finishes Hitler Pewds off and dies much drama Pewds 1 steals Ragdoll Jerry for his girlfriend. A few days later ragdoll Jerry is depressed and thinks of the times him and Hitler Pewds had together. Ragdoll Pewds kills himself. Pewds 1 realizes he is broken/dead. The universe get's altered. Alpha and Omega. All that shit. The End.
The TIME FOR REVENGE! video, which is a sequel to the aforementioned video, features two new versions of Pewds as well as Pewds 2 aka Hitler Pewds. He goes into a bathroom, shaves, and becomes a priest. Then the video ends on aCliff Hanger.
"No. Just... No" Reaction: His response to finding out that Xuarest Xth killed his mother in Mad Father, and then killed her and wiped the blood off of her face just to notice how pretty she was was essentially:
Pewds: ""Surgery Failed"..."And it was going so well..."... Bob has left us, Bros... He was such a good friend... He was always there for me... I'm going to miss him so much... *sobs* ... His beautiful face, that I haven't seen.. Half of his nose, that I haven't seen either. It was.. special. What me and Bob had, it was something you see once in a lifetime... Bob was one of those guys you could just go out and have a beer with. And make out a little bit with. And it wouldn't be awkward the day after. Bob was that guy. He would actually touch my butt a lot, and it would tickle. In the nicest way... Bob knew how to treat me like a princess... *sigh* ... Bob... You will be remembered... I love you. One day, we'll meet again. And then... I will kiss you. I will gather the courage... and I will lick your nipples. Bob... Bob... *sobs*..."
In his Playthrough of The Walking Dead, he becomes very protective of Clementine, the little girl that the player character takes in. At one point he even explicitly states that he'll stop playing the game if she gets killed off. The same applies towards Ellie from the Last of Us.
He's also very protective of Fluffy. He even states that he would uninstall the game if he died ( he doesn't, by virtue of never existing in the first place).
Pet the Dog: Quite literally, as Pewdie has had several dogs, the most famous being Maya (or Puga as they sometimes call her). Edgar's probably a close second.
Play the Game, Skip the Story: In-Universe. This was averted in his early playthroughs where he would take care to read the journals so common in horror games- however as time progressed he began to skip them more and more.
Rage Quit: In part 17 of his Fahrenheit Let's Play, he just got up out of his chair and left his house for about a minute after Carla says "I love you" to Lucas after actually knowing him and being in the same room as him for about five hours tops.
He has done this several times now in his Dark Souls lets play often not coming back for several hours or even a day. To be fair though, the game tries it's hardest get this reaction out of anyone who plays it and is very good at inducing rage.
Relax-o-Vision: Invoked in his playthrough of the Amnesia mod House of Creep 3 - he gets so spooked by the sheer amount of Teleporting Naked Guys in the hallway, he has to quit the game and look up pictures of kittens. He refers to it as "Kitten Therapy" and sometimes does the same with puppies.
Sanity Slippage: Pewdie's second playthrough of SCP-087-B may be the closest time he's come to being completely traumatised. Towards the end, he starts whimpering and begging for the game to stop, and when he reaches the final scare, he calms down and proclaims he's a man, then runs out of the room screaming.
Screw This, I'm Outta Here!: When he sets off an alarm in Zombi U, he just pauses the game and says that he doesn't want to play anymore. Later subverted when he realizes that it's too early to end the part and keeps going.
After Pewdie finally snaps while playing a rage game (one that a bro made for him, no less), he states that Edgar will be taking over the channel.
In one of his videos co-hosted by Cry, PewDiePie invites him to do the outro. However Cry can't remember it so instead of "Stay awesome bros, bah-hiiiiii" he comes up with "Bro day, every day." which has become a Catchphrase of it's own.
It turns out that brandishing a hammer will just make Smashnese.
Occasionally crosses into this territory with particularly obvious blunders, resulting in near (in-game) death. Especially bad when he ignores text on the screen telling him what to do, then complains about being lost.
When playing Cat Mario, Pewdie has a tendency to try moves and strategies over and over again... even after they're shown to be ineffective when used the first five or so times.
"Should I really go down here? I don't think it's a good idea... but let's do it anyway!"
Stephano frequently warns Pewdie that looking back never works in Amnesia. And immediately after he warns Pewdie, guess what Pewdie does?
Visual Pun: In "HOW TO SMILE!", Pewds lists "foot tattoos" as one of the Little Reasons to Smile. We then see a close-up of Pewds' face, and then it zooms out to show an actual drawing of a foot on his forehead. He then says "I don't get it."
In "8 MILLION BROS!", one Pewdie says how much he loves playing Candy Crush Saga. Another Pewdie says how much he loves crushing candy (with a hammer).
At the end of "YOUTUBE COPYING!", Pewdie is shown copying...with a copier.
Vitriolic Best Buds: Pewdie and his dog Edgar. If you follow him on Twitter, it makes more sense.