Playmaker Actions Request

Yeah, but i can't do that if i'm using variables. For example, each enemy that appears adds a value to a variable, and when it is destroyed/leaves screen it subtracts that value. That means i use a variable for adding, and i have to subtract by manually entering the numner, which is kinda not handy.

I can subtract when the enemy is destroyed via killable, but does it count as "destroyed" when it despawns on leaving screen? I reckon not, what should i use in the "Else If" field for modifying a variable when it is despawned?

Oh, ok. I have a wave generation system which works the following way. Few enemies spawn and each of them has a certain int value (smaller value for easier enemies, bigger for tougher ones) which is added to the "enemy pool" when they spawn. When the enemy is destroyed or leaves the screen, that same value is subtracted from the "enemy pool". After a few seconds, a check is done, if the pool is not full, some more enemies are added until the pool is full. Rinse and repeat. Kind of a self-adjusting difficulty mechanism. The "enemy pool" is actually just an integer variable with a progressively increasing threshold which says "no more spawning".

Destruction is easy to handle via killable, but despawn is not. So it comes down to two solutions:

1) Use two variables for each enemy value, one positive for use in killable, and one negative for usage with playmaker action.

2) Use only one positive variable for use in killable, and manually enter the negative value in the playmaker action in the despawn state.

You'll agree that both solutions are impractical when it comes to tweaking a large number of variables for nailing the gameplay.

Other things that may help:

You can definitely in Playmaker create a copy of another variable and multiply it by -1 to get the negative version to use for whatever. Which you could use for your original question.