There will be a new enemy that will be included in the game soon. The silent ones will become more of the foot soldier, and the new enemy type will arrive that will provide more of a new challenge to the player and provide a more scarier experience. Also invaders, I know that the big silent ones are a bit slow when catching up to the player so I will include a patch that will increase their speed and the damage that they can do. I will let you guys know when the updates are implemented.