Tumble Mode is a minigame added to the Console Edition Minecraft, added in the TU41, CU30, 1.33, and Patch 11 updates. It is an official variation of the popular user-generated game called "Spleef".
Similarly to Spleef and Battle Mode, Tumble Mode is a "last player standing" game. The objective of the game is to knock Blocks out from underneath other players while standing your own ground. The last person standing on the platform is the winner and the game cycles to the next map. In one mode of Tumble, players stand on a single, massive platform and attempt to destroy their opponents' footing with an Iron Shovel. In another mode, there are three tiers of platforms which players must dig out from each other using Snowballs.
Unlike traditional Spleef, all blocks can be broken with one hit of a Shovel (similarly to Creative Mode) or Snowball. TNT is an exception, acting as both pitfalls for unaware players and time-bombs which can be used to destroy the ground and lower platforms.