8, 2007, was released worldwide February 23, 2009. Aealo, the band's tenth studio album, was released on February 15, 2010, in Europe and February 23, 2010, in the United States. Their eleventh album, Katá ton Daímona Eautoú, was released in March 2013. They made their first appearance in South Asia on September 13, 2014, in India (Bangalore Open Air 2014 Edition) and September 14, 2014, in Sri Lanka. Their twelfth studio album, Rituals, was released on February 12, 2016. To coincide with their 30th anniversary, the band released a new 7-inch single "The Call" on February 9, 2018; the single's b-side is a live version of "The Sign of Evil Existence", which includes guest vocals by Behemoth's Nergal and Varathron's Stefan Necroabyssious. The band also released an official biography entitled "Non Serviam: The Official Story Of Rotting Christ" in late November 2018, written by Sakis Tolis and British author Dayal Patterson (author of 'Black Metal: Evolution Of The Cult', 'The Cult Never Dies Vol. One' and 'Into The Abyss') and published by British publishing house Cult Never Dies. The book features extensive interviews with Sakis Tolis, Themis Tolis, Jim Mutilator, Morbid, George Emmanuel and members of the bands Watain, Mayhem, Enslaved, Moonspell, Blasphemy, Mystifier, Septicflesh, Behemoth, Macabre Omen, Cradle Of Filth and Immolation The book has since been released in Greek, Russian and Czech languages. Rotting Christ's thirteenth studio album, The Heretics, was released on February 15, 2019. In 2020, Rotting Christ announced a collaboration with the video game developer Cold Symmetry on their action role-playing video game, Mortal Shell. The game's launch trailer, released in August 2020, featured the song "χξς (666)" as its soundtrack. In addition, a downloadable content pack, titled "Rotten Autumn", was released for the game in October 2020 and includes, among other content, an alternative soundtrack composed by Rotting Christ. Line-up The permanent line-up consists of brothers Sakis Tolis (vocals and guitar) and Themis Tolis (drums). Third founding member Jim Patsouris played bass until 1996. Andreas Lagios was the bassist since 1997, taking the stead of Patsouris until the end of 2011. Nightfall's Giorgos Bokos joined as a guitarist in 2005, replacing Costas Vasilakopoulos. In February 2012, Bokos announced his departure from the band for personal reasons. In December 2012, the new members of the band were announced: guitarist George Emmanuel and bassist Vagelis Karzis. George Emmanuel and Vagelis Karzis amicably left the band in