Support player "MiSTakE" met top laner "Stanley" while playing in the League of Legends ranked solo queue ladder.

Shortly after connecting, their mutual friend "colalin" introduced them to "NeXAbc" and former Counter Logic Gaming player "Lilballz".

In the playoffs, Taipei Assassins took out MksZ 2–0 in the semifinals and then played a show match with the visiting CLG EU, which they lost.

The Assassins continued their streak and defeated Corsair 2–0 in the grand finals, qualifying for the Season 2 World Championship in Los Angeles.

Of the five regional champions, four teams, including TPA, were given a free pass out of the group stage based on a random drawing.

Despite being underdogs after NaJin Sword's strong group stage showing, the Assassins were able to come out with a victory, winning both games dominantly.

[6] TPA beat the Korean squad three games to one, securing the championship title and taking home the one million dollar grand prize.

"Zonda" was brought in as a substitute for top lane while GoDJJ joined as a second AD player; the changes suggested the formation of a second squad under the organization in the near future.

The Singapore Sentinels managed to defeat Saigon Jokers in the semi-finals, setting the stage for a showdown between the two strongest teams in the GPL.

The strategy caught TPA off guard, and SGS managed to end the game in a rout of the Taiwanese squad.

However, Toyz turned the tide of the game with a spot-on Orianna ultimate during a close Dragon fight, which decimated SGS and their chances at the title.

TPA had a good performance in the group stage, going 3–1–1, winning against Positive Energy, LGD Gaming, and Royal Club Huang Zu, while tying against Najin Sword and losing to MVP Ozone.

This unfortunate outcome was directly linked by many people to Lilballz's inability to adapt to the Season 3 jungle meta.

TPA eventually finished the Spring Split of the GPL 27–1, losing only 1 game to SGS, which people again linked directly to Lilballz.

In the beginning of Season 4, TPA acquired "Morning" from Wayi Spider as the new mid laner; while "BeBe" switched back to AD Carry and "DinTer" became the substitute.

They managed to beat Full Louis (3–0), Saigon Jokers (3–2), and Taipei Snipers (3–2) in the knock out stages and became the champion of the tournament.

They came to All-Star Paris 2014 as Taiwan & SEA representative but they got a bad tournament with 4 losses against Cloud 9, Fnatic, SK Telecom T1 K, and OMG.

TPA then managed to win against Insidious Gaming Rebirth (3–0); Saigon Fantastic Five (3–1); and ahq (3–0) to become the champion of the tournament the third time, getting the #1 seed of Taiwan & SEA Region in the World Championship 2014.

Taiwanese singer Jay Chou announced on 19 April 2016 that he had acquired the LMS spot of Taipei Assassins for his new esports organization, J Team.