I am making a game like counter strike. i want to add enemies in it. can anybody help????????

I am making a game like counter strike. i want to add enemies in it. can anybody help???

  1. Create the 3d models, and their animations in any modelling package of your choice.
  2. Drag and drop these models into Unity.
  3. Write script code that implements the brains of these enemies.
  4. Write an enemy manager in script code that instantiates the enemies for you.
  5. Make prefabs for the enemies.