Arcade flight games also use simplified physics and controls in comparison to flight simulators. These are meant to have an easy learning curve, in order to preserve their action component. Increasing numbers of console flight video games, from "" to "Ace Combat" and "Secret Weapons Over Normandy" indicate the falling of manual-heavy flight sim popularity in favor of instant arcade flight action. Other types of arcade-style games include fighting games (often played with an arcade controller), beat 'em up games (including fast-paced hack and slash games), light gun rail shooters and "bullet hell" shooters (intuitive controls and rapidly increasing difficulty), music games (particularly rhythm games), and mobile/casual games (intuitive controls and often played in short sessions).