Rising Storm has always been a realistic shooter series. Vietnam is no different. If you have played the Arma series you will probably enjoy the dedication to war simulation, if however you are expecting a game like Call of Duty or Battlefield, prepare for a rude awakening to true simulated warfare.
Be a sneaky VC and place a trap on a forest track to surprise the G.I.
Burn out a village hut with a flame thrower as a Marine engineer.
Hide in bushes and bayonet the enemy as one wonders past.
Ride into the LZ on a Huey and pocket the rice fields with your M60.
As commander, Call in Artillery and send pink mist across the enemies lines.
Rising Storm 2: Vietnam is accurate, brutal, 64 Player Warfare.
A tip for any new player, take it slow. Don't be a leeroy. Listen to your commander / Squad Leader and most of all, play the objective! If you come into Rising storm with the correct expectations you will have an amazing time, if you come into it with the wrong interpretation you will end up aggravated.
The community is very active and loyal to the series. They can be very helpful but also rough on new players, especially if you refuse to follow those simply tips I mentioned. Be a team player and the team will be there for you.