Chell

"There should be one in the corner"

Chell (from Portal 2) by AngelaBermudez

Photographed at the I-Con 2013 in Panama City

Kids: Skull Kid

Skull Kid (from The Legend of Zelda: Majora's Mask) by Kraaku

Photographed by Mthows1 at Kitacon Invasion in Birmingham, UK

Norn

Norn (from Groundwork 2) by Svetlana Quindt (Kamui)

Photographed at WonderCon Anaheim 2014

Gaige the Mechromancer

Gaige the Mechromancer (from Borderlands 2) by NA0I

Photographed by itsl0ki  at Connichi 2013 in Germany

Ellie and Joel

Ellie and Joel (from The Last of Us) by Nerdbutpro

Ellie

Ellie (from The Last of Us) by NerdbutPro

Booker DeWitt

Booker DeWitt (from BioShock) by Zacloudseth

Photographed by Obscura Vista at Otakon

Rule 63: Big Sister

Big Sister (from BioShock 2) by Malinda Mathis
Photographed by Dewey

Not all Rule 63 cosplay has to sexy.  Sometime it's refreshing to come across a bit of Rule 63 that's even more terrifying than the original.

Video: Super Mario Bros Parkour

"Super Mario Brothers Parkour [In Real Life]" by Warialasky

Kitty Cat Katarina

Kitty Cat Katarina (from League Of Legends) by Danielle Beaulieu
Photographed by Orange Mochi Photography, Xen Photography, and Stephane Laroche.

The Norn

The Norn (from Guild Wars 2) by Andraia63

Photographed by Michael Clancey of WeNeals Photography

Parents: Joel and Ellie

Joel and Ellie (from The Last of Us)

Photographed at Wondercon 2014

Source: Imgur via Reddit

Miss Moxxi

Miss Moxxi (from Borderlands 2) by Thelema Therion

Photographed by Giuseppe Foto

Lara Croft

Lara Croft (from Tomb Raider) by Noémie

Photographed by Mathieu Degrotte

Kids: Ahri

Ahri (from League of Legends) by Garena

Katarina

Katarina (from League of Legends) by Tanita Osaki
Photographed by Witchsister Photography

Sarah Kerrigan

Sarah Kerrigan (from StarCraft II) by Freia D.N.A. Raven

Photographed by Andrey Shinkarchuk

Kids: Claptrap

Claptrap (from Borderlands 2)

Photographed by Dangadelha at PAX Australia

Rikku

Rikku (from Final Fantasy X-2) by RyuuLavitz

Kids: Pit

Pit (from Kid Icarus) by Keaden

Photographed at AWA 2013

This is one of the most ridiculously adorable boy's costumes I've ever seen.  I seriously doubt that he's ever played the game his character is from, though.