A Tumba based Death Metal act forged by bassist / keyboard player Heinous (a.k.a. Jonas Berndt / 'Goth Gorgon'), prior to his founding of MȪRK GRYNING. Berndt also has association with DIABOLICAL and WYVERN. A two song 1994 demo session featured vocalist Daniel. Far Beyond Human Productions released a second demo, 'Battle Of Titans' featuring guitarist Peter Wendin, in 1996. RAISE HELL and SINS OF OMISSION guitarist Jonas Nilsson also figured in an early line-up. A third MORTIFER set, 1987's 'Running Out Of Time', included a cover version of KREATOR's 'Take Their Lives'. The group then recorded tracks during 1998 for an intended album, given a title 'Masters Of The Universe', but this was never released. MORTIFEr's final effort, the single track promotional session 'Harbringer Of Horror', emerged in 1999.

MORTIFER's final roster involved Heinous, Dementor (Danny Eideholm) and drummer Devastator (Dennis Ekdahl) of ATHELA, BLOODSHED, MYSTIC PROPHECY, MOURNFUL, RAISE HELL, RUTTHNA and SINS OF OMISSION.