Total of 1,081 bands played at an Obscene Extreme festival. All the Czech festivals were held in Trutnov - Na Bojišti, except 2009, which was in exile in Svojšice. The list also includes bands that played on the OEF world tour in 2013, 2014 and 2015.
List of all bands can be found here https://obsceneextreme.cz/en/bands/history.