Really great game.

Most of the people on here are saying you have to spend real money in order to win, but you actually dont need to. I didnt and Im on round 180 still going strong. The trick is to get the dual lightning, your passive lightning leveled up, buy the toxic upgrades as soon as possible, and level up you energy refill and repair in the mean time. Granted, this seems like a lot of stuff, and it will take time. You will also encounter some "dark times" where you have to think carefully about what to spend your money on. The game becomes easier when you use toxic. For those who do not know what it is, toxic is basically 3 piles of acid you deploy on the field. With each upgrade you get 3 more. I believe the total is 21. But place these on the borders so enemies hit it as soon as they are on the screen and they will melt away. Toxic is very deadly in the early rounds and is a MUST HAVE. Another helpful tip, if you are low on health or energy DO NOT buy the refill. Instead upgrade the towers energy or health capacity. That way you upgrade how much it can hold and it completely refills it saving you money!
Only useful specials Ive noted are: toxic, mines, E-punch, and quake.
**Dont even consider the fireball. Even with it maxed out, it takes way too much energy and you find yourself launching them when you didnt even want to.**

Bballtonio about Tesla Wars, v3.1.4