Due to his competitive nature, Barney often likes to complete challenges posed to him, and accepts these challenges by saying "challenge accepted". Usually, this is said while looking up and standing.
Most of the challenges he accepts revolve around seducing women. Often, he attempts challenges that no-one has asked him to undertake, that no-one cares if he succeeds or not. However, this does not deter him at all, and he still makes a great effort to complete all challenges he accepts.
- Sleep with Marshall's professor. 
- Hook up with a 22-year-old while in his old man make-up. 
- Complete Ted's Murtaugh List. 
- Talk his way out of a speeding ticket. 
- Hook up with a girl while wearing Marshall's old overalls. 
- Pick up a girl whilst talking like a little boy. 
- Touch everything in the Museum of Natural History. 
- Get back together with Nora. 
- Find Marshall and Lily's sex tape. 
- Seduce a bridesmaid over the phone. 
- Get laid wearing Ted's Red Cowboy Boots. 
- Break Krirsten and Calvin up. 
- ↑ Aldrin Justice. Challenge completed
- ↑ Intervention. Challenge completed.
- ↑ Murtaugh. Ted allowed Barney to forfeit.
- ↑ As Fast As She Can. Challenge failed.
- ↑ The Window. Challenge completed.
- ↑ Baby Talk. Challenge completed.
- ↑ Natural History. Challenge completed.
- ↑ Challenge Accepted. Challenge completed.
- ↑ No Pressure. Challenge completed.
- ↑ Farhampton. Challenge completed.
- ↑ The Over-Correction. Unknown.
- ↑ Something New. Challenge failed.
|Friends & Family||Ted Mosby • Robin Scherbatsky • Marshall Eriksen • Lily Aldrin • Leslie • Loretta Stinson • James Stinson • Eli Stinson • Sadie Stinson • Jerome Whittaker • J.J. Whittaker • Carly Whittaker|
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|Others||Barney's Blog • 83 • Barney's magic • Barney's Wedding • High Fives • The Bro Code • The Playbook (book) • The Threeway Belt • Ducky Tie (object) • The Eight Slaps • Nothing Suits Me Like a Suit • Tuxedo Night • Barney's Get Psyched Mix • Party School Bingo • Platinum Rule • Lemon Law • Hot/Crazy Scale • The Mermaid Theory (theory) • Freeway Theory • The Chain of Screaming (theory) • The Ewok Line • Intervention banner|