Gameplay logic

Basic description

One gameplay session will last 20-30 minutes
While the time passes, different waves of enemy forces will attack the players position
- With every new wave the strength and type of enemy forces will increase
While the time passes, the player will get upgrade options for their defense systems
With increasing progress new defense systems will be available for the player
After every wave of enemy attacks the player will gain new research points to invest in upgrade research
The locations where defense systems can be placed are strictly defined (the player can not freely place a turret anywhere on the terrain, only on certain locations / slots)
Existing defense systems can be dismantled to use the location for another system
The gameplay session is won if the end of the session is reached and the player has at least one defense system left
The gameplay session is lost if all defense systems of the player are destroyed
Existing defense systems can be repaired while they are not firing at enemies

Place the right turrets and traps at the right locations (long range weapons can be positioned further away while a flamethrower should be close to the road where it can hit the enemies)
Keep track of using special actions / skills of your machines when they are available and their cool down / charge period has passed
Do not forget to upgrade your turrets and traps as their upgrade options get unlocked
Invest gained research points in the right research projects of your engineers
Use the time between attacks to repair your defense systems