Combat Mission: Shock Force which is essentially ArmA: Commander's Edition
Strong focus on realism. Even has ballistics for bullets and there's wind affecting all kinds of stuff.
^ Fucking ATGM valley. One missile not only can just take out a tank but a half of a squad. As you can see two of them just barely missed my squad but enough for me to bring the tank within 50m of them from the hill operators had no eyes on. ATGM team won't attack a tank so close to it with a missile because that will be suicidal.
Different types of ammunition are also simulated. A HEAT round makes for a big explosion, while a SABOT round is like a giant spike that can blast through obstacles. It can penetrate through houses, blasting enemy armor on the other side upon exit.
Javelin AT systems that infantry carries can be used not only just to blow up enemy vehicles but also to destroy a house wall, killing infantry hiding inside.
Artillery can make all the difference between winning an losing the mission. And it's usually very limited and shots take minutes to arrive - just like IRL. In fact the game even simulates aiming shots coming first before more on-target barrage begins.
In this mission I had an aiming shot hit a retreating tank and blast through its weak upper armor. Different types of arty ammunition is also simulated - f.e. ICM, just like IRL, blows up above ground sending shrapnel downwards, working like a celestial shotgun.
And yet it's just a wargame. Where's your Panzer General now?