First off, I can't put a video cause I don't have windows movie player or etc. I'll just have to explain it. For 2X2's and 4X4's I will call them 2X2 Mega tower or 4X4 Mega Mega Tower when they're upgrade, otherwise, they aren't when I don't put that.
So... You wanna get to wave 400 in BTD? This is the guide for you.
1. Go to any unlimited waves stage with enemies going from left to right and put on mega cheat. (the thing with unlimited bubbles at stage select)
2. Put 4X4 initial towers in all corners, underneath the one in the top left put 2 slow burst and 2 weaken towers.
2a. Also in the middle put 4 2X2 towers, Leaving one square on top and 2 square on bottom for enemies to come through. At the exit of the bottom road put a sniper tower.
3. Okay this is the most crucial part that you MUST follow. The information I will now explain will be referring to all 4X4 initial towers on all corners except for top left one.
3a. So imagine the 4X4's and nothing around them. make the initial towers on all corners of the 4X4's sniper towers.
3b. Now do this. S's are sniper towers, D's are damage boosts, and F's are fire rate boosters.
SDDS DFFD DDFD SDDS
Do this to all 4X4's except for the one in the top left.
3c. Upgrade them to 4X4 Mega Mega Towers.
4. Now top left 4X4. S's are sniper towers, D's are damage boosts, F's are fire rate boosts, and R's are range boosts
SDDS RFFD RDFD SDDS
4a. Upgrade it to a 4x4 Mega Mega Tower.
I will now talk about the 2X2 towers in the middle from here and on.
5. For the top 2X2 initial do this. S's are sniper towers, D's are damage boosts.
SD DD
5a. upgrade it to a 2X2 Mega Tower.
6. Now the 2X2 underneath that one do this. F's are fire rate boosts.
FF FF
6a. Make it a 2X2 Mega Tower.
7. Make the bottom 2X2 like this. S's are sniper towers, F's are fire rate boosts, and D's are damage boosts.
SD SD FD or you can do FF
7a. upgrade it to a 2X2 Mega Tower.
LAST STEP!!!
8. Make the final 2X2 like this. G's are ghost splashes, D's are damage boosts, and R's are range boosts.
GD RD
Finally... I'm done. If you're careful and juggle then you should be invincible. Oh also send one wave at a time once you get to about wave 300 it helps. Lastly, post here if you have a problem.
