Adventure Mode: The Kiss of Death

The Kiss of Death is a single-player story mode of Super Smash Bros. Life or Death. Accessed from the single-player section of the menu, revolves around the entire roster of fights facing off against one another in a conflict involving the matters of life and death, with multiple enemies from the past getting involved with the conflict as the final battle for the world happens for what may be the last time. It is best described as a fusion of previous Adventure Modes, The Subspace Emissary, World of Light, and The Elemental Labyrinth, combining both platforming with boss battles and special battles as well as allowing fighters to level up during battles. 
==Gameplay==
The Kiss of Death mode is a side-scrolling adventure in the style of a platformer, inspired by the Mario and Kirby games. However, it retains all basic mechanics of the Super Smash Bros. series, such as a damage meter, stocks, and Smash-style attacks. It can also be classified as a beat 'em up; often stages will pause at specific points and force the player to defeat a set of enemies, which prevents one from simply running through everything.
The mode features a world map where stages are selected; once a stage is selected, the difficulty can be chosen, and the character(s) will enter the stage. The selectable characters will change depending on the plot. Stages that have been completed already can be played again with the exception of some stages where the player must wait until the mode is beaten.
The mode also has a two-player option. When using two players, the first player will have priority over the screen, making it possible for the second player to get run off the screen if the two players are not coordinated. However, the second player has the option to warp to the first player at any time (except in boss battles) by pressing the button that would normally pause the game. The first player must be present with stock left at all times; if the first player runs out of stock, the game will end and offer a continue, regardless of whether the second player still has stock left. If the second player runs out of stock, the first player can continue alone. In addition, only the first player can navigate through doors (though the second player can still utilize keys) and temporary switches. If the second player goes into a barrel cannon or minecart they will be teleported back to the player seconds later unless the first player goes in right after. The second player can also decide when barrel cannons shoot.
When playing a level for the first time, many cutscenes will pause just before gameplay begins, showing a view of all available characters. A message will display how many stock the level allows, and a cursor will appear that allows choosing which characters to play. The order characters are chosen in is the order they will appear: they will cycle through in that order until all stock is depleted. Playing through a level again, there will be a screen before the level allowing choosing between any available characters instead of cutscenes during the level. This can be both an advantage and a disadvantage: there is a wider character variety to choose from, but one cannot (for example) choose only three characters for a four-stock stage. Additionally, no mid-level cutscenes will play, including ones that would normally allow a re-pick of characters that replenishes stocks. While on many levels this makes little difference, it is very problematic on long stages like the second Subspace Bomb Factory, where a replay provides only a fraction of the stock originally given.
The physics of many (if not all) characters are also tweaked slightly. In general, characters run slower, fall faster, and jump better than in brawls. However, the midair jumps of a character that possesses more than one will be worse than normal. Move mechanics are not altered, although the differing jump heights, jump timing, and gravity will change how effective aerial attacks are. The most significant change is the removal of stamina from Pokémon Trainer's Pokémon, which allows one to use one Pokémon exclusively. Characters are also able to swim for significantly longer. Characters retain their standard physics in boss battles. Because Smash relies on KOs by being knocked off stage, in order for the platforming nature to be retained, the camera's reaction time in following a character decreases in proportion to the player's damage.
Grabbing mechanics are also altered. Normal enemies cannot be held onto for any length of time; they will be thrown immediately after being grabbed, making it impossible to pummel them. This means that choosing which throw to use must be done with the Control Stick during the grab animation; inputting no direction will result in a forward throw (with the exception of Donkey Kong, who cannot carry enemies, and instead will utilize his up-throw). Special moves that involve grabbing will fail to grab, like Yoshi and Kirby's standard special moves; such moves have extra Subspace Emissary-only hitboxes (for example, Egg Lay will deal 13% damage, while Pikmin will deal damage when thrown). Bosses and large enemies cannot be grabbed; however, Big Primids can be grabbed effectively. None of these changes apply when facing an opposing Smasher due to playing like an actual match, though Kirby will be unable to copy their abilities.
===Skill Tree===
The Skill Tree is a menu item returning from World of Light. In it, the player can spend Skill Spheres (スキルのかけら Skill Fragments) in order to learn Adventure Skills. These are effectively power-ups akin to the skills granted by Support Spirits (and can stack with their equivalent Spirit skills), and appear as icons resembling the stat boost icons found in Smash 4's Smash Tour and Smash Run. Obtaining a power-up also makes power-ups further down the tree available. The player can spend SP to forget a power-up and gain back all of the Skill Spheres spent on it.
== Plot ==
=== Endings ===
== Fighters ==
== Bosses ==
Category:Story Modes