Yes, we too had forgotten all about ShellShock: Nam '67, Eidos' hyper-violent Vietnam War third person shooter. The publisher reminds us today of its existence with the debut trailer for the sequel, which gamers everywhere are calling Shellshock 2: Blood Trails, because that's its name. Given the below-average marks the first Shellshock received, we're not overly enthusiastic about its chances this holiday season, but at least they scored the rights to "Freebird."
The Vietnam war was an ugly, disturbing, traumatic experience for soldiers that still have a hard time coping some 40 years later. Even those called heroes don't think of what they went through like that.
Now how do you capture that in a game (particularly a genre that loves the thrill of battles and not the horror)? By making a game so ugly, disturbing and traumatic that it messes gamers up for life?
Well that won't work, now will it. These are 'just' games, right? So they can never effect us that way, even though movies can and do (Apocalypse Now and Full Metal Jacket STILL mess with me some).
Many gamers and even devs like to have it both ways. That's why a Vietnam War game hasn't and won't work.