Onslaught may refer to:
Characters Onslaught (Marvel Comics), a Marvel Comics supervillain Onslaught (DC Comics), a DC Comics team of Quraci terrorists Onslaught (Transformers), the leader of the Combaticons in the Transformers series
Games Onslaught (Magic: The Gathering), an expansion to the Magic: The Gathering collectible card game Onslaught, a gametype in the first-person shooter computer game Unreal Tournament 2004 Onslaught (1989 video game), a 1989 Amiga beat'em up computer game Onslaught (2009 video game), a 2009 Wii first-person shooter video game A co-op mode in the video game Battlefield: Bad Company 2 ONSlaught, a libre game engine cloning the proprietary engine NScripter Mortal Kombat: Onslaught, a 2023 role-playing video game by NetherRealm Studios
Other Onslaught (film), a 2026 action horror film produced by A24 Onslaught (band), a British thrash metal band Onslaught, a 2002 science fiction novel by David Sherman Onslaught (Dove), a short film/advertisement made by Dove for their Campaign for Real Beauty