La trama ripercorre quella del film omonimo con due differenze in particolare: tutti e tre i personaggi principali (Kick-Ass, Hit-Girl or Big Daddy) appaiono fin dall'inizio mentre la scena del rapimento compiuto dai malviventi viene modificata rispetto all'originale nel caso in cui il giocatore abbia deciso di utilizzare Big Daddy, venendo rapita Hit-Girl insieme a Kick-Ass<ref name="Geislerint"/>.
Unlike the comic book and movie, the video game story line introduces all three characters from the start. When Kick-Ass first tries to be a superhero, the thugs beat him. Hit Girl and Big Daddy appear and attack the thugs. The game begins after Kick-Ass is freed from the thugs. The circumstances of the storyline differ depending on which character the player selects. For instance in the film Frank D'Amico's men kidnap Kick-Ass and Big Daddy. In the game's storyline, this would not be possible if the player selects Big Daddy as their character, so in that event the game would instead have Hit Girl be kidnapped.<!--Geisler uses this exact example--><ref name="Geislerint"/>
==Modalità di gioco==
Il gioco è un picchiaduro in cui il giocatore può scegliere uno dei tre personaggi disponibili in modalità singola o multigiocatore.
The gameplay of Kick-Ass is an arena-style [[beat 'em up]]. Players can choose to play 1 of 3 characters (Kick-Ass, Hit-Girl or Big Daddy) in either single player or co-op mode. Weapon upgrades as well as environment finishers are always available in the game. The game utilizes both joysticks on the [[PlayStation 3]] and is a "Twin-stick shooter" for the iPhone.
==Sviluppo==
Ben Geisler, theil executiveproduttore produceresecutivo ofdi [[Frozen Codebase]], saidin inuna intervista a ''[[GameSpot]]'' interviewha thatdetto theyche decidedhanno todovuto createinventare a fictionalil social networking website called "Facespace" insteadche ofcompare usingnel thegioco realal posto del reale [[Myspace]], thatche iscompare usedanche innel thefilm, ''Kick-Ass''a filmcausa because ofdi "licensingproblemi issues.di licenza"<ref name="Geislerint">{{cite web |url=https://www.youtube.com/watch?v=B9qUE3L7he4 |title=Today On the Spot 4/29/10 by GameSpot |author=GameSpot |date=May 3, 2010 |website=[[YouTube]] |publisher=[[Google]] |access-date=December 3, 2010 |archive-date=September 13, 2016 |archive-url=https://web.archive.org/web/20160913054924/https://www.youtube.com/watch?v=B9qUE3L7he4 |url-status=live }}</ref>.
