Contra 4 is an action-packed run and gun video game developed by WayForward Technologies and published by Konami for the Nintendo DS. It was released in 2007 as part of the Contra series' 20th anniversary. The game revives the classic Contra gameplay with updated graphics and new mechanics, allowing players to wield dual weapons and grapple across gaps. Set after Contra III: The Alien Wars, it tasks players with battling waves of alien forces and culminates in challenging boss fights. The game is renowned for its difficulty, paying homage to the challenging nature of the original titles.