The Assembly demoparty is a demoscene and gaming event in Finland. The main organizers of the event are Pekka Aakko (Pehu of Accession) and Jussi Laakkonen (Abyss of Future Crew). The Summer event takes place every year between late July and early August, and lasts three to four days, and the Winter event is held in January or February.
The most recent Assembly was held from August 3rd to August 6th at Messukeskus in Helsinki.
Assembly Winter was announced in early 2007. The winter party is a more gaming oriented LAN party type event where as the summer events continues the traditions of the original demoparty under the name Assembly Summer. Both parties are held once a year. Assembly is the world's largest gathering of demo programmers.
The first Assembly was held from July 24 to July 26, 1992, in Kauniainen. It was organized by the Amiga demo groups Complex and Rebels, and the PC demo group Future Crew. The staff grew into a large non-profit group of individuals known as Assembly Organizing. Through the 1990s, Assembly grew so large that even exposition halls no longer sufficed, and only the largest of sports arenas met the partygoers' needs. In 1999 they rented the largest sports arena in the country, Hartwall Areena in Helsinki, with over 5000 visitors and 3500 computers on the ice rink.
The 2004 edition of the party also set up a record: in July 2004, QuakeCon announced it was holding the world's first Doom 3 competitions on the event starting on August 12–14, roughly a week after the game's release on August 3. Assembly, however, managed to snatch the first place after acquiring copies of the game via FedEx with the help of some contacts in the United States and holding the competition during August 5–8.