This is a video of me, Tasselfoot, beating Track 4 of BTD5 Bloons Tower Defense 5 on Hard Mode without losing a life. Yes, I use the secret agent... but, as always, it's purely to make my life easier... you don't need to; you can use road spikes instead.

Video is on 3x speed.

Game: http://ninjakiwi.com/Games/Tower-Defense/Play/Bloons-Tower-Defense-5.html