Tower Balancing
It is now easier to get the different types of towers earlier in the game.
The price of all towers has been reduced significantly and all damage has been reduced accordingly.
You no longer have to upgrade base towers to level 3 to get the next types of towers for that base.
This means you will be upgrading, building, and expanding quickly as the level progresses.
Passives
A new Passive Tree has been added to the game which gives minor upgrades to towers, heroes, and misc things.
You earn 1 point for each level on normal mode and 3 points on hard.
Other Noteworthy Changes
Heroes can now take damage from monsters and will die if health reaches zero. They will have a minute downtime and be resurrected at the command center.
Only ground monsters that do not cast anything will attack the hero.
Lightning towers now "shock" monsters which increases damage taken for a very short duration of time.
Replaced the Mega Lightning tower with a lightning nova tower which discharges electricity in a circle around the tower.
A lot of the debuffs that immobilize monsters have been reduced in either the chance or the value applied.
A new monster has been added to Hard difficulty which is immune to all debuffs.
Hard difficulty now has increased frequency of attacking monsters.