

Konami later released an enhanced version of Salamander in Japan bearing the American title of Life Force which further fleshes out the organic motif. The power-ups are also given different names, with the "Speed-Up" becoming "Hyper Speed", the "Missile" becoming the "Destruct Missile", the "Ripple Laser" becoming the "Pulse Laser", and the "Force Field" becoming the "Shield". Stages that featured star field backgrounds had them changed with the web background from Stage 1 to maintain consistency with the organic setting of the plot. The Japanese and European versions are nearly identical, but the American version changes the game's plot by adding an opening text that establishes the game to be set inside a giant alien life-form which is infected by a strain of bacteria. The arcade version of the game was released under its original title, Salamander, in Japan (version J) and Europe (version D), and as Life Force in North America. The player gains power-ups by picking up weapon-shaped capsules left behind by certain enemies, as opposed to the selection bar used in other Gradius titles. The buy-in feature is available in single-player mode, and the continuation feature is only available in dual-player mode but they will both cease to be available once the final stage is reached. Players can immediately restart back into the action instead of being pushed back to a predefined checkpoint per Gradius tradition. The game features six stages which alter between horizontal and vertical scrolling. The first player controls Vic Viper and the second player takes the reins of debuting spacecraft Lord British.

Super Space-Time Fighter Vic Viper, launch!! Extending their support, they fly to the Salamander Army's mother star. The Gradius Army receives British's distress call. The prince of Latis threw himself at battle with the Space-Time Fighter Lord British, named after himself, and requested help from the planet Gradius, which was said to have faced and defeated the cluster's forces before. The Latis Army, however, didn't have any way of fighting against Salamander. Here in planet Latis, the Bacterion cluster continues to spread, beginning its invasion with the Salamander Army. There, a prophecy of fire has been passed down since a long time ago: Thousands of light years away, when a giant dragon born and living in a sea of flames wakes up, a crazy force will approach, swallowing heaven and earth in the darkness and eventually breaking the light. Latis was a planet covered by water with a beautiful sparkle.
