Source plot synopsis — includes the ending
One of the Monarchs is Apollyon, a judge of the Dead. Milo and Lola sneak into a demons-only bar to find her. Apollyon sees through their disguises and agrees to give them a seal if they serve as lawyers for Roberto, a soul charged with serial murder. Milo and Lola can either throw the trial per Apollyon's wishes, or let Roberto ascend to heaven and challenge Apollyon afterward; either way, Apollyon will give the pair her seal.
Another Monarch is the hard-partying Asmodeus, who is trying to forget about his recent breakup with his ex, Beth. Milo and Lola can either get Asmodeus and Beth back together or beat Asmodeus in a dance-off to obtain the necessary seal.
Having obtained the needed seals, Milo and Lola return to Satan's party, with a team of challengers drawn from the people they have befriended during the night. Apollyon attempts an intervention, feeling that Satan's drinking is out of control and Hell is suffering because of it, but Satan angrily teleports Milo and Lola away to continue the drinking contest.
The game has multiple endings, depending on Milo and Lola's performance in the drinking game. If they win, they are sent back to Earth and resume their lives. If they lose the contest or refuse to play, they remain in Hell. Some time afterward, Milo and Lola relax at a bar and discuss the current situation; depending on the player's actions, Satan can be recovering from his addictions or have fallen off the wagon, but Hell appears to be running better. Sam bursts in, having discovered another way to possibly escape Hell, to which Milo and Lola immediately agree.
Sources and content license
Source and revision history ↗ · Adapted from Wikipedia contributors, Afterparty (video game). Section headings and formatting adjusted. · Content license