The title Movie War is used for Kamen Rider films which feature crossovers between TV series. Each film features characters from the series that is airing at the time and the previous one:
List of films FilmKamen Rider SeriesKamen Rider × Kamen Rider W & Decade: Movie War 2010 (2009)Kamen Rider DecadeKamen Rider WKamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core (2010)Kamen Rider OOOKamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max (2011)Kamen Rider FourzeKamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum (2012)Kamen Rider WizardKamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle (2013)Kamen Rider GaimKamen Rider × Kamen Rider Drive & Gaim: Movie War Full Throttle (2014)Kamen Rider DriveKamen Rider × Kamen Rider Ghost & Drive: Super Movie War Genesis (2015)Kamen Rider GhostKamen Rider Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Riders (2016)Kamen Rider Ex-AidKamen Rider Heisei Generations Final: Build & Ex-Aid with Legend Rider (2017)Kamen Rider BuildKamen Rider Heisei Generations Forever (2018)Kamen Rider Zi-OKamen Rider Reiwa: The First Generation (2019)Kamen Rider Zero-OneSaber + Zenkaiger: Super Hero Senki (2021)Kamen Rider SaberKamen Rider: Beyond Generations (2021)Kamen Rider Revice