Operation Flashpoint - Red River
Operation Flashpoint: Red River is First-Person modern shooter that puts you in charge of a squad of marines in three different fictional conflict scenarios (all within the same story arc).
I've found the game play to be fairly difficult due mainly to the controls system, however if you do remain patient while this may at times still be a occasional problem but not enough of one to permanently spoil your enjoyment of the game.
The tactical and shooting elements of the game are more often than not difficult, but this is a challenge more than anything else, accuracy is key when your in a fire fight at close range, or taking a sniper out 150 metres away, and you do feel where as other games may have been made easy to appeal to gamers, this has the feel of a more realistic need for tactics and aiming to be spot on.
The single player campaign is really good, and certainly for those willing to persevere is worth the time and effort, and seems lengthy enough to keep you entertained for a good while.