Grendel is one of three antagonists, along with his mother and the dragon, in the Anglo-Saxon epic poem Beowulf (AD 700–1000). Grendel is usually taken to be some kind of monster, though this is the subject of scholarly debate. In the poem, Grendel is feared by all but Beowulf.
Grendel and his mother are described as descendants of the Biblical Cain. Beowulf leaves Geatland in order to find and destroy Grendel, who has been attacking Heorot court, killing and eating anyone he finds there. After a long battle, Beowulf mortally wounds Grendel by ripping his arm off. Grendel dies in his cave under the swamp. Beowulf later engages in a fierce battle with Grendel's mother, over whom he triumphs. Following her death, Beowulf finds Grendel's corpse and removes the head, which he keeps as a trophy.
"The monster who appeared in the poem of Beowulf. He raided the hall of Hrothgar, king of Denmark, for 12 years until the Swedish hero Beowulf ripped his arm off. The next day Beowulf found Grendel in his lair below the lake and beheaded him."
—Shin Megami Tensei: Strange Journey compendium
A Grendel was one of the victims of Jack's Squad experiments and was freed alongside the others. He had no intention of thanking them for saving them since their kind are the ones who did it, and takes the other survivors with him to Sector Grus. A barrier is placed that prevents the protagonist from proceeding forward, and Grendel gives him the option of killing Jack's Squad and in exchange he would remove it. The protagonist can also choose to kill him, leading to the barrier dissipating upon Grendel's defeat.
Shin Megami Tensei IV[]
Grendel has set a Domain over the Jujo Base north of Ikebukuro. Defeating him earns the relic SDF Equipment, which is needed for the Challenge QuestHeavy Weapon Recovery. He later appears as a regular enemy in Camp Ichigaya. Grendel can teach Flynn the Mortal Jihad and Charge skills through his Demon Whisper.
Shin Megami Tensei IV Apocalypse[]
Grendel can be found in Ikebukuro. He can teach Nanashi the Mortal Jihad, Head Crush and Purple Smoke skills through his Demon Whisper. He benefits from learning Physical attack skills.
Devil Summoner: Soul Hackers[]
"The monster who appeared in the poem of Beowulf. He raided the hall of Hrothgar, king of Denmark, for 12 years until the Swedish hero Beowulf ripped his arm off. The next day Beowulf found Grendel in his lair below the lake and beheaded him."
—Devil Summoner: Soul Hackers 3DS compendium
Devil Survivor 2[]
"The monster best known from the saga of Beowulf. He raided the hall of Hrothgar, king of Denmark, for 12 years until the Swedish hero Beowulf ripped his arm off. The next day, Beowulf found Grendel in his lair below the lake and beheaded him."
—Devil Survivor 2 compendium
Shin Megami Tensei: Liberation Dx2[]
"A hideous giant great claws from the poem "Beowulf." Irked by the boisterous bellows ringing from the hall of Kind Hrothgar, he attacked, ferociously killing many of Hrothgar's men. Hearing of the evil deeds of Grendel, the hero Beowulf took up arms, slaying the foul creature in an arduous battle."