The new additions to the Kaltenbach Open Air 2021 lineup are as follows:
Primordial, Decapitated, Cattle Decapitation, Ingested, Nordjevel, Diabolical, Hideous Divinity, Asenblut, Darkfall, Fleshless, Malokarpatan, Skull Crusher, Erebos, Pequod, Morost, Lowbau, Sin Eater, Severed Survival (ex-Sarcastic Terror)
With those additions, the lineup is complete!