TNT Run: Floor Collapse, Abilities, and Sudden Death

TNT Run’s collapsing floor mechanics, the Jump Feather ability, randomized floor boosters, and the Sudden Death world border that activates at 8 players.

TNT Run challenges players to keep moving across a multi-layered floor made of Sand, Red Sand, Gravel, and TNT blocks. Every block you step on disappears a fraction of a second after you leave it — stand still or lose your footing and you fall to elimination. The last player standing on the floor wins the match.

How a Round Works

After /tnt iniciar <template> clones the arena and teleports everyone in, a 10-second preparation countdown begins. Players cannot be eliminated during this phase — the block-removal system is paused and an action bar counts down the seconds. When the timer hits zero, the floor starts collapsing.

Block Removal

The plugin tracks the four corners of each player’s bounding box every 2 ticks (approximately 10 times per second). Any Sand, Red Sand, Gravel, or TNT block directly beneath those corners is scheduled for removal after 6 ticks (~0.3 seconds). This short delay gives you just enough time to step off before the block disappears. If a TNT block is removed and there is another TNT block directly below it, that lower block is also removed in the same operation.

Elimination

You are eliminated when your Y position drops to within 2 blocks of the world’s minimum height. The plugin checks all alive players every second, so there is a brief grace period between falling through the last layer and being officially eliminated.

The Jump Feather

At the start of the active phase, every player receives a Jump Feather (a Feather item with 3 uses and a 5-second cooldown per use). Right-clicking it launches you upward, giving you a burst of vertical momentum to escape a collapsing section of the floor and land on a still-intact layer above or beside you.

The Jump Feather has 3 charges shown as item count. Once all 3 are used, the item disappears from your inventory. Use them carefully — they do not replenish during the match.

Floor Boosters

During the active game phase, floating item displays appear randomly across the arena floor. Walk into one to collect it instantly — the collection radius is 1.5 blocks. Boosters follow the same gravity logic as the floor blocks and fall if the block beneath them is removed.

Booster	Effect	Duration
Speed I	Speed I potion	10 seconds
Speed II	Speed II potion	6 seconds
Speed III	Speed III potion	3.5 seconds
Jump Boost I	Jump Boost I potion	10 seconds
Jump Boost II	Jump Boost II potion	6 seconds
Jump Boost III	Jump Boost III potion	3.5 seconds
Mix	Speed II + Jump Boost II	5 seconds each
Salvation Pearl	Adds an Ender Pearl escape item	Instant pickup

Higher-tier Speed and Jump boosters are stronger but shorter-lived. Grab a Speed III when you need to clear a large gap quickly, but use it before it runs out.

Sudden Death

When the alive player count drops to 8 or fewer, Sudden Death activates:

1. An announcement is broadcast to all alive players and spectators.
2. The world border activates at 80 blocks centered on the first arena spawn point.
3. The border shrinks by 15 blocks every 30 seconds, down to a minimum of 10 blocks.
4. Players receive action bar warnings for the final 10 seconds before each border reduction.

The border does not appear until Sudden Death triggers. Once it activates, it cannot be paused or reversed.

Arena Setup

1. Create the arena template

   Register the Slime world as a run arena. The name must match the .slime file on disk.

   /tnt arena create <name> run
   
2. Add spawn points

   Stand at each desired starting position and add it. Add multiple spawns so players start spread across the floor.

   /tnt arena addspawn <name>
   
3. Start the game

   Clone the world and begin the match.

   /tnt iniciar <name>