During the combat minigame, you’ll encounter all types of bosses. As you complete more quests in OSRS, you’ll face them inside the Nightmare Zone. These are the bosses that you could potentially face. Also, if you want to fight a particular boss, we’ll mention the quests that will unlock them. - Trapped Soul – The Ascent of Arceuus - Count Draynor – Vampyre Slayer - Sand Snake – The Depths of Despair - King Roald – What Lies Below - The Kendal – Mountain Daughter - Me – Lunar Diplomacy - Skeleton Hellhound – In Search of the Myreque - Tree Spirit – Lost City - Dad – Troll Stronghold - Khazard Warlord – Tree Gnome Village - Black Knight Titan – Holy Grail - Ice Troll King – The Fremennik Isles - Bouncer – Fight Arena - Black Demond – The Grand Tree - Jungle Demon – Monkey Madness I