Bravo Romeo Delta is an interesting wargame that lets you implement a "limited and controlled" strike against either America or Russia.You must find the precise timing, weight, and mix of nuclear responses to achieve victory while avoiding Armageddon. You can mix-and-match different strikes and parcel them out to your subs, ICBMs, and strategic bombers. It's absorbing, realistic, and will really teach you a few things about organizing nuclear strikes ;)