Operation Flashpoint: Red River

Core skill points are gained from completing campaign missions or Fireteam Engagements.. The medal you get after finishing the mission determines how many skill points you get. You will be awarded three points for getting gold, two points for silver and one point for bronze.

Once you have accumulated nine points you have to distribute them all into one of the six core skills and confirm. To allocate core skill points, choose the "Player Progress" main menu option. Don't be afraid to do so as you can reset your point distribution with . This also enables you to get this achievement fast if you should have allocated some points prior to reading this.

A detailed overview of the score required to get the ranks can be found on my solution for Lifer in Operation Flashpoint: Red River.

Review 25 September 2014: Added button icons.

This is earned by using skill points earned from missions to upgrade your core skills in the player progress area

You earn skill points by completing missions dependant on what medal you get.
Bronze= 1 skill points Silver= 2 skill points Gold= 3 skill points

In each core skill you need 9 points because 1 already alloted in each so to max them out in total needing 54 to do them all
30 points from campaign and 24 from fireteam engagements