***Gotta Get 'Em All: ***
End a game with all the enemy Towers destroyed.
Top Percentile:
As Twitch, hit all enemy champions with Expunge Contaminate at max stacks. In 5v5 or more only.
Didn't Need a Bigger Boat:
Take less than 30% of your max HP from a single Chum the Waters, and stay alive afterward (until the assist timer would countdown).
PRAISE THE SUN!:
As Leona, kill an enemy Diana with Solar Flare.
Poot-poot:
Make a Singed Poison Trail 10,000 units long.
Toot-toot:
As Hecarim, hit an enemy champion with Devastating Charge after travelling for the entire duration.
War-Pony Express:
As Hecarim, hit all enemy champions with a single Onslaught of the Shadows (R) to make them move in the direction of your team, and your team kills all of them with you getting the assist/kill credit for each one.
It Just Keeps Happening:
As Sivir, have a single Ricocheted chakram bounce eleven times (12 targets hit total).
Do You Have A Moment To Talk About The Glory of Satan/Mushrooms?
As Teemo, be stealthed for at least ten seconds while at least three enemy champions walk within 500 units of you and drop stealth by attacking at least one of them with a dart (AA or Q). Survival is required as well.
The Cold Ain't No Thang:
As one of the Freljord leaders (Ashe, Sejuani, Lissandra), end a game without dying to an enemy Rival (kill or assist credit) while killing them at least once.
Not So Fast:
As Caitlyn, kill an enemy Jinx with Ace in the Hole while she has her Get Excited! buff.
Belts Are Useless Against MAYHEM:
As Jinx, kill two or more of a Rival's (Caitlyn and Vi) allies with both of you surviving the fight.
CAW CAW CAW:
Deal a total of 5000 or more damage with a single Crowstorm and get the kill credit for at least two enemies during it.
Nightmare's Nightmare:
End a match where you were Feared a total of 30 seconds on a champion with an ability that Fears.
Bank of Draaaaaaven
Earn a 500 or more gold bonus with a single Leauge of Draven proc.
Eternal Rage:
As Tryndamere, take what would be lethal damage while your Undying Rage is active three times in one life, one count per activation.
Double Double Double-tap:
As Lucian, use Lightslinger (Passive) on enemy champions four times in 8 seconds.
I actually only wanted to do the first 7, but I felt the two Pokemon ones would be too apparent.