In Stock mode, each player is given a chosen amount of lives, and every time they are KO'd or self-destruct, they lose a life. Should two or more players accumulate the same amount of points, there will be a Sudden Death match to determine the winner. At the end of the designated time limit, the player with the most points wins. In Time Mode, each player receives a point when they KO an opponent, and loses a point if they are KO'd, or if they self-destruct. Matches can be played in either Time, Stock mode, or a combination of the two.

Players can customize their controls in the menu. P-2 uses the 1 key on the numpad for special moves (or activating a Final Smash), numpad 2 for standard attacks, numpad 3 for shield and numpad 4 for taunt. The O and P keys still remain in P-1's possession, however, as the O key is used for special moves (or activating a Final Smash), the P key for standard attacks, the I key for shield, and the 1 key for taunting. The W, A, S, and D keys are now assigned to Player 1's movement, while the arrow keys move a second player. The controls are also different from its predecessor. The higher the percentage, the easier it is for a character to be knocked off the stage. As the character is attacked, damage accumulates, and the percent value increases. Unlike most traditional fighting games, a character's health is measured by a damage percentage counter. Super Smash Flash 2's gameplay is very similar to the official Super Smash Bros. The following explanation is based on the gameplay of the demo. games, as the content inclusion criteria has been loosened to include content from any series that has ever appeared on a Nintendo console, allowing the roster access to other third and fourth-party characters including, but not limited to Lloyd, Rayman, Goku, and Ichigo. However, this Flash game does not aim to clone the Super Smash Bros. series, featuring many of its gameplay mechanics and characters. The game is based on the Super Smash Bros.

Although initially referred to as a sequel, Super Smash Flash 2 is a reboot of the critically received fan game Super Smash Flash. Super Smash Flash 2, commonly abbreviated as SSF2, is a periodically-released nonprofit Flash fighting fan game developed by the Super Smash Flash 2 Team, led by Gregory Cleod9 McLeod, and published by McLeodGaming. Since the future subject is still under active development to reach the due date, all information below is subject to change at any time without prior advice. This article regards about an upcoming work or similar media.

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