Battlefield (戦場 Senjō) is a special stage in Super Smash Bros. Melee that is unlocked by clearing All-Star Mode on any difficulty, with any character. The field's main part is flat, just like Final Destination, but not as long. Three smaller platforms are suspended in a pyramid pattern above the main platform. Since this level is considered fair, it is a tournament legal stage. It shares cosmetic similarities to Final Destination that the background is abstract and changes shape and color constantly.
In Classic Mode, a randomly selected metal character (it can be any character in the game except for Ganondorf, Mr. Game & Watch, or Roy) are fought on this stage during the tenth round. In Adventure Mode, the Fighting Wire Frames, Metal Mario, and Metal Luigi are fought on this stage in the eleventh stage of the adventure. In All-Star Mode, Mewtwo is always fought on this stage. Lastly, every Multi-Man Melee mode takes place on this stage.
Recovery on this stage is considered difficult for many characters due to the very thin edges on either end. If a player misses the edge with a vertically aimed up special move, they will end up underneath the stage, and suffer a possible KO. It is more difficult to sweet spot the edge using characters such as Marth and Fox on this stage compared to other similar stages. There is one exception to this: with Falco (and more difficultly with Fox), it is possible to platform cancel his Falco Phantasm (or Fox Illusion) move on one of the bottom platforms. Then, the player can choose to immediately phantasm to the next platform, which also platform cancels.
Battlefield is also infamous for its "glitchy" edges. It is said that, unlike other stages, if players attempt to sweet spot the ledge and hold toward the ledge as they do so, they may often miss the ledge when it clearly appears they should have been able to grab it. For example, it is possible for Peach to be floating within the edge grab range, but then not grab the edge and simply plummet after she stops floating. Also, there have been cases where 'miracle ledge grabs' have been performed in cases where it did not appear as if the character should have survived.
Also, there is a technique that allows Captain Falcon to sweet-spot the ledge almost immediately after starting his Falcon Dive move, if he is in a specific area of the stage, somewhere between the ledge and the ceiling underneath. It is, however, extremely difficut to perform and thus is not considered practical in most situations. A demonstration and in-depth explanation can be seen in this video.