Just some gameplay of an oldschool game : Rainbow Six - Raven Shield (best tactical game in my opinion).
It is realistic in damage (no vampire like health regen / 15 bullets to die) and forces the player to use tactics in order to win, due to its difficulty.
The objective is to eliminate all terrorists in this mode. The difficulty here is nuts and is very hard to win when going alone and not having an AI team covering your blind spots. It took loads of retries to do this in elite difficulty.
Side note about difficulty and AI : As this game is old, the AI is pretty unstable, it goes from doing headshots with pistols while running backwards at 60 meters in a milisecond, to being mentally retarded and running around in circles. I was quite lucky in some spots here but I guess it is because I played this over and over :)
![](https://i.ytimg.com/vi/sronh-_BrK8/maxresdefault.jpg)