Life Force, formerly known as Salamander, is a scrolling shooter arcade game developed by Konami Digital Entertainment. It was released in 1986 as a spin-off of Gradius and has since become a classic in the gaming world. The game features simplified power-up systems, two-player cooperative gameplay, and both horizontally and vertically scrolling stages. These features later became the norm for future Gradius games.

The game is set in space, and the player takes control of a spacecraft tasked with destroying the enemy forces. The game features challenging levels with unique enemies and bosses that require strategy and skill to defeat. Life Force also has an impressive soundtrack that complements the game's fast-paced action. Overall, the game is an enjoyable and challenging experience that any action game fan will appreciate.