Here is the full list of unlockable achievements for Operation Flashpoint: Red River for the Xbox 360. The secret achievements you can unlock are listed at the bottom in their own section.
Buzz Kill (5) – You destroyed an enemy aircraft with an anti aircraft weapon
Catch This! (5) – You destroyed an enemy vehicle with the FGM-148 Anti Tank Weapon
Danger Close (5) – You called in Combat Support within 300m of your location
Defender (10) – You completed one of the Last Stand FTE maps
Devils At The Crossroad (20) – You completed Careful What You Wish For
Doing It The Hard Way (20) – You completed Almost Too Easy
Driver’s Ed (5) – You drove a humvee
Florence Nightingale Award 2.0 (20) – You healed a development team member or someone who already has this achievement
Freeing The Eagles (20) – You completed Vantage Point
Get To The Chopper! (20) – You completed a Last Stand mission to stage 4, wave 4 and escaped alive
Hardened (10) – You maxed out one core soldier skill
Keeping It Simple (20) – You completed 1st & 10, Let’s Do It Again
Lifer (30) – You maxed out all core soldier skills
Of The People, For The People (5) – You picked up an enemy AK
Old Enemies Die Hard (5) – You killed your first PLA soldier in Red River campaign
Operation Dragon Slayer (100) – You completed Act 3 of the campaign
Operation Unbroken Resistance (75) – You completed Act 2 of the campaign
Operation Enduring Shield (50) – You completed Act 1 of the campaign
Outlaw 2’s Brave (10) – You obtained the highest level for one character class
Outlaw 2’s Finest (30) – You obtained the highest level for two character classes
Outlaw 2’s Hero (50) – You obtained the highest level for all character classes
Package Delivered (20) – You completed and survived a CSAR mission, rescuing both pilots
Peacekeeper (20) – You completed and survived a Combat Sweep mission having killed all enemies and destroyed all caches
Pride of Balletto (10) – You completed a mission as the Auto Rifleman
Pride of Kirby (10) – You completed a mission as the Rifleman
Pride of Soto (10) – You completed a mission as the Scout
Pride of Taylor (10) – You completed a mission as the Grenadier
Protection Detail (20) – You completed Meet The Neighbors
Protector (10) – You completed one of the Rolling Thunder FTE maps
Rescuer (10) – You completed one of the CSAR FTE maps
Shock And Ore (20) – You completed End Of The Beginning
Sweeper (10) – You completed one of the Combat Sweep FTE maps
The Alamo, Vahdat (20) – You completed Line In The Sand
Thunder Run (20) – You completed and survived a Rolling Thunder mission with the entire convoy surviving
Venomous Bite (20) – You completed The Human Terrain
Veteran (20) – You maxed out three core soldier skills
Weaponsmith (5) – You customized a weapon
Welcome To Gissar (20) – You completed Welcome To Tajikistan
With A Little Help (10) – You played Red River with three other friends
Work Your Bolt (20) – You completed The Wrong Way
Here are the ten secret achievements you can unlock:
Rule #1 (20) – Don’t get shot
Rule #2 (20) – Short, controlled bursts
Rule #3 (20) – You discovered what Knox’s Rule #3 is
Rule #4 (20) – Watch your bullet drop
Rule #5 (20) – Patch your wounds
Rule #6 (20) – Keep a full mag
Rule #7 (20) – If in doubt, fall back
Rule #8 (20) – Keep the enemy suppressed
Rule #9 (20) – Orders
Rule #10 (20) – Beware of confined spaces