mousesports announced the creation of its League of Legends team officially on February 4, 2012.  In addition to a League of Legends team, mousesports also sponsors players and teams for StarCraft 2, CounterStrike: Source, CounterStrike Global Offensive, DotA2, FIFA, Pro Evolution Soccer, and Trackmania.
Formation of mousesports
Mousesports began their history in League of Legends on February 5th, 2012, signing the players from team For Mother Russia, consisting of Flashy, BlorN, Blazzka, Nexiq, and PlagiaT. A month later, original members Blazzka, Nexiq, and PlagiaT would leave, being replaced by wewillfailer, puszu, and Hmmer. However, despite these roster changes, Mousesports would disband their League of Legends division on April 20th of 2012. Two months after disbanding their League of Legends team, Mousesports would reform the section, signing MoMa, Candy Panda, Prothana, Dedrayon, and dax.
Mousesports would participate in their first major tournament at the Elite of Europe invitational. In the playoffs of the event, Mousesports would take out SK Gaming in the quarterfinals and Moscow Five in the semifinals to advance to the grand finals. There, Mouse would fall to Curse Gaming EU 1-2, taking home second place from the tournament.
On January 21st, 2013, all of enVision accounts were permanently banned from League of Legends due to toxic behavior, he was subsequently suspended from the Riot Season 3 EU Live Qualifier as well as from the Riot Championship Series for one year.
Prior to the start of the Challenger Spring Season, mousesports acquired the roster of n!faculty, who had a spot in the tournament. The team went 0-8 in the first four weeks of the tournament before beating Gamers2 in both games of the fifth week. However, this was not enough to move them up in the standings, and they finished in the sixth-and-last-place slot, behind Reason Gaming.
After the departure of SozPurefect, Rawbin IV and Xaxus, a ranked 5's team named m0usesports0 was formed, climbing the ladder with a roster consisting of beansu, Dan, Jinsh, Sedrion, and MounTain. Jinsh was eventually replaced by Xioh before the roster sealed their qualification to the 2015 EUCS Summer Qualifier via the Challenger Ladder.
- January 22nd, rhuckz joins. Sedrion renames to Tarik. Zhergoth and Endless (now Endz) join as subs. Xioh and noway leave.
- January 25th, Simon, Rainha, and Fyasco join as analysts.
- February 5th, Nardeus joins. Tarik becomes a sub.
- February 12th, Tarik leaves.
- February 19th, Zytan joins. rhuckz leaves.
- March 14th, Sebekx leaves.
- April 21st, Inero leaves coaching role.
- April (approx.), Wardain, Caps, Upset (previously Ohq v1), and Norskeren join. beansu, Nardeus, Zytan, Zhergoth, and Endz leave. Simon becomes head coach. Lauren and Fyasco leave analyst roles.
- February 18th, roster of n!faculty is acquired. Xaxus, Rawbin IV, SozPurefect, Sedrion, and MounTain join.
- March 18th, Xaxus and Rawbin IV leave. 
- April 24th, SozPurefect leaves.
- May 3rd, roster of beansu, Obvious, Xioh, Sedrion, and MounTain wins ESL Meisterschaft Spring 2015.
- May 26th, beansu, Dan, and Xioh officially join.
- July 14th, Gilius and noway join as subs.
- August 25th, Xioh steps down. Jinsh becomes the new starting midlaner.
- October (approx.), Jinsh leaves.
- October 29th, MounTain leaves.
- November 18th, Gilius leaves.
- December 10th, Sebekx joins.
- March 4th, mousesports acquires a new League of Legends team. Kubon, Mokatte, TakeFun, Makler, and Libik join.
- April 2nd, Mokatte retires. KonDziSan joins.
- May 11th, roster is released. Kubon, KonDziSan, TakeFun, Makler, and Libik leave.
- January 19th, enVision is banned from the LCS for one year.
- February 21st, Bambino, Buddha, dX, Gazek, Platin, and Sebastian join.
- March, Play int its ok joins as the top laner while Bambino transitions to jungle. Gazek moves to the substitute position.
- March, YoungBuck leaves.
- April 11th, Warhunter leaves.
- April 16th, unso joins.
- May 2nd, mousesports signs the players from Dexter is actually evil. Kikis, dexter1, Moopz, foo sharp, and AoD join.
- June, dexter1 leaves.
- June, Osaft22 and Troubley join as subs.
- August, active roster released. AoD, Kikis, Foo Sharp, Moopz, Osaft22, and Troubley leave.
- February 5th, mousesports signs the players from team For Mother Russia, Flashy, BlorN, Blazzka, Nexiq, and PlagiaT.
- March 16th, Blazzka, Nexiq, and PlagiaT leave while wewillfailer, puszu, and Hmmer join.
- April 20th, mousesports LoL team disbands. Flashy, BlorN, wewillfailer, puszu, and Hmmer leave. 
- July 9th, mousesports re-forms League of Legends team with MoMa, Candy Panda, Prothana, Dedrayon, and dax.
- July 17th, 2nd place in Elite of Europe.
- September 22nd, dax and Candy Panda leave. Prothana switches to AD role.
- October 26th, Pheilox and Jwaow join.
- December 7th, mousesports acquires the roster of The Mighty Midgets. 760, VandeRnoob, SuperAZE, Gliukoze, and Moopz join while MoMa, Dedrayon, Prothana, Pheilox, and Jwaow leave.
- December 31st, mousesports acquires Prothana, Kujaa, enVision, YoungBuck, and Warhunter, while the previous roster disbands.
Mousesports's 2015 Season EUCS Summer Playoffs Starting Lineup
|| Contract Ends
||Tore Hoel Eilertsen
||Chief Executive Officer
||Head of Video
|| Dream Team
|| Lublin Shore
- ↑ mousesports ventures into LoL
- ↑ enVision Ban : League of Legends Competition Ruling League of Legends Competition Ruling
- ↑ Inero's tweet twitter.com
- ↑ Gearing up for the EU Challenger Series blog.mousesports.com
- ↑ Inero's tweet twitter.com
- ↑ Tarik's tweet twitter.com
- ↑ rhuckz's tweet twitter.com
- ↑ Sebekx's Facebook Post (Polish) facebook.com
- ↑ Will not be renewing my contract with Mousesports. Currently open for offers twitlonger.com
- ↑ mousesports returns to League of Legends mousesports.com
- ↑ MounTain's Post facebook.com
- ↑ SozPurefect's Tweet twitter.com
- ↑ Announcement from Xioh facebook.com
- ↑ Announcement from TheMountain facebook.com
- ↑ Unicorns Of Love's Facebook Post facebook.com
- ↑ mousesports' Tweet twitter.com
- ↑ mousesports in League of Legends mousesports.com
- ↑ mousesports signs KonDziSan mousesports.com
- ↑ mouz parts ways with LoL team mousesports.com
- ↑ eSports Competition Rulings: Suspensions of mouz enVision and aAa linak leagueoflegends.com
- ↑ EPS Spring 13 kicks off mousesports.com
- ↑ Summer Update warhunterlol.com
- ↑ Unso Twitter Update twitter.com
- ↑ mousesports signs dexter is actually evil mousesports.com
- ↑ Changes in our LoL division
- ↑ Mousesports LoL team disbands mousesports.com
- ↑ mousesports presents new LoL team mousesports.com
- ↑ Moma Facebook Post facebook.com
- ↑ Pheilox and Jwaow join mousesports mousesports.com
- ↑ mousesports signs Mighty Midgets mousesports.com
- ↑ League of Legends reformation for 2013 mousesports.com