Full list of all 55 Operation Flashpoint: Red River achievements worth 1,125 gamerscore.
The base game contains 50 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 125 Gamerscore.
You obtained the highest level for all character classes
You obtained the highest level for two character classes
You maxed out all core soldier skills
You maxed out three core soldier skills
You obtained the highest level for one character class
You completed a Last Stand mission to stage 4, wave 4 and escaped alive
You played Red River with three other friends
You completed and survived a Rolling Thunder mission with the entire convoy surviving
You completed one of the Rolling Thunder FTE maps
You completed and survived a Combat Sweep mission having killed all enemies and destroyed all caches
You completed one of the CSAR FTE maps
You completed and survived a CSAR mission, rescuing both pilots
Watch your bullet drop
You completed one of the Last Stand FTE maps
You completed one of the Combat Sweep FTE maps
You healed a development team member or someone who already has this achievement
Keep the enemy suppressed
You completed Act 3 of the campaign
You completed End Of The Beginning
You discovered what Knox's Rule #3 is
You maxed out one core soldier skill
You completed Vantage Point
You completed a mission as the Auto Rifleman
You destroyed an enemy vehicle with the FGM-148 Anti Tank Weapon
You completed 1st & 10, Let’s Do It Again
You completed a mission as the Scout
You completed Act 2 of the campaign
You completed Line In The Sand
You completed a mission as the Grenadier
Orders
You completed Careful What You Wish For...
You completed The Wrong Way
You destroyed an enemy aircraft with an anti aircraft weapon
You drove a humvee
If in doubt, fall back
Short, controlled bursts
You killed your first PLA soldier in Red River campaign
You completed Act 1 of the campaign
You completed Almost Too Easy
You completed The Human Terrain
Keep a full mag
You called in Combat Support within 300m of your location
You picked up an enemy AK
Beware of confined spaces
You completed Meet The Neighbors
Don't get shot
Patch your wounds
You customized a weapon
You completed Welcome To Tajikistan
You completed a mission as the Rifleman
You obtained a Gold rating on all VOD FTE maps
You completed a VOD Last Stand map with over 1 million points
You destroyed an enemy tank with C4 on a VOD map
You completed a VOD Rolling Thunder map without the convoy ever stopping
You found the pilots & destroyed the chopper in under 5 minutes on a VOD CSAR map