you cant
You can't.
BTD - Before the Dawn - was created in 2010.
BTD stands for bearing temperature detector.
sniper baloons, and ninja baloons detect without any upgrades
There might be a demo on Xbox Live.
Use cheats
There is no Gran Turismo 5 demo. However, you can play Gran Turismo 5 Prologue.
In Reverie - 2012 BTD 1-3 was released on: USA: 6 December 2012
A btd file type is typically associated with Bloons Tower Defense, a popular tower defense video game. Players may come across btd files when customizing or modding the game. These files can contain game data, maps, or other information specific to Bloons Tower Defense.
btd files are created with a cool piece of software called Business-in-a-box. However, you can't open these files with anything else.
36-38degrees btd
how to btd file to converd doc