Insomnia54 was the 54th installment of the Insomnia gaming festival, taking place at the Ricoh Arena in Coventry, England from April 3-6, 2015. Halo 2: Anniversary was played in 4v4 competition alongside Counter Strike: Global Offensive, Dota 2, Hearthstone: Heroes of WarCraft and League of Legends.
- Double-elimination bracket
- Best of 5 series
A total of £3,000 GBP in prize money is awarded.