Insomnia56 was the 56th installment of the Insomnia gaming festival, taking place at the National Exhibition Centre in Birmingham, England from December 11-13, 2015. Halo 5 was played in 4v4 competition alongside Hearthstone, Counter Strike: Global Offensive, Dota 2, League of Legends, Rocket League, Call of Duty: Black Ops III, FIFA 16 and Super Smash Bros. for Wii U.
Insomnia56 was the first major open Halo 5 event in the UK, allowing up to 32 teams to register. Epsilon eSports dominated the event, dropping only a single game en route to their second major tournament win.
- Double-elimination bracket
- Best of 5 series
A total of £3,000 GBP in prize money is awarded.