The Special Ops mod aims to open up Blacklist to the player, giving you many new options for tactics and customization, while removing many of the limitations and handicaps that made the game easier and less rewarding. You'll find it's much harder for the player to control the battlefield and track enemies. A fully stealthy approach is even more difficult than before, and getting spotted can be very deadly if you are unprepared. You'll have to use a much wider range of tactics to evade and eliminate hostiles rather than striking from the shadows over and over - preparation is key. Hostile guards are sharp and deadly, and enemy commandos are a force to be reckoned with.
If you let these guys find you chances are you'll end up dead, like this.
Did you modify the waves?
No, I don't think that's possible without a trainer