Invention
Add

- Hellfire Torch : Maximum durability of the Decoy -500, 0.5 second knocked out by the Decoy attack.
- NB-8 Screwdriver : When the Decoy's durability is less than 500, the speed of the Decoy's attack speed increases by 50%.
- Ice Mine : Create ice mines with 5% probability when enemy is killed. (30% slow for 2 seconds)
- Cooling Fan : When any one of the drone skills are not available, Increases all towers' PEN by 12
- Soild Safe : Increase all tower PEN by half the number of cores.
[Now only translated in Kor / Eng/ China]
Adjustment
- Robot Solvent : Increases all towers' PEN by 12 -> 10
- Emergency Siren : Decreases the drone skills' cooldowns by 30% when the Decoy's durability is 50% -> 500 or less.
- Drone Snack Bundle : Requires 4 -> 3 fewer Cores when crafting an invention.
Add new challenge mode

Tower Shrink Device
Reduce all towers size by 50%.
Increases the chance of obtaining scraps by 2x.
Building speeds by 2x.
All enemies HP 60% increase.
[Now only translated in Kor / Eng/ China]
Change
- The difficulty is displayed for each mode.
- The number display for 'Enhance' / 'Weakened' has been converted % -> number.
- When connected to more than one radio tower, only the effect of the actual buffing radio tower is expressed.
Bug fix
- In first sector, train-running robot has corrected a phenomenon that has not been released by a stun.
- We corrected the phenomenon of not attacking the train-running robot when upgrading the 'Tactical Firing' effect of the Heavy Weapon Tower's parts.
- The enhancement of the radio tower was corrected, which was different from the actual 'Enhance' application.
Christmas preparations !

Everyone is getting ready to enjoy Christmas together.
Please look forward to Christmas updates!
