Finally broke 80 and I think I’m done with this game lol.
You will never get to 90. That fact that the creator of the game got that is bunk, IMO.
83
81 Damn, I think the best way to do it is upgrade the towers one at a time.
Cause when upgrading to the:
3645 dmg
200 rng
$640
It actually upgrades the damage to 1450 dmg. Now if it did actually upgrade to the 3645 dmg I think you definitely would get farther in the game.
Still the champ 
[quote]Cephalic_Carnage wrote:
Bunch of well-made tower defense games usually with lots of options and upgrades:
http://www.towerdefensehq.de/de/spiel/flash/146 (Vector TD, one of the best ever)
http://www.towerdefensehq.de/de/spiel/flash/412 (Warzone TD, endless TD with open maps which you can wall in and so on. Pretty cool. Start with map “enclave” I think to have it easy at the beginning and learn the game. Some underpowered towers though, avoid laser tower unless you really like building walls to herd in the enemy…)
http://www.towerdefensehq.de/de/spiel/flash/304 (Frontline defense, war-themed thing with missions instead of endless play, lots of towers and upgrades, pick machine-gun tower as your first imo… Neat graphics.)
http://www.towerdefensehq.de/de/spiel/flash/133 (Onslaught TD, you can upgrade a lot of different aspects of each tower and towers can use many different combo attacks depending on tower combination etc once you’ve gotten their firepower up to max)
And no, it’s not my fault if you waste half your life in front of your pc due to these.
[/quote]
You bastard.
Hands down the best tower defense game!
Vector is awesome and comes with cheesy sci-fi beats, sound optional.