There are 50 achievements with a total of 1000 gamerpoints. Unlock the Achievements by doing the said task and then get it along with it's alloted gamerscore.
Achievement Description #1 Defense (25) Have the #1 ranked defense in a dynasty season. #1 Offensive (25) Have the #1 ranked offense in a dynasty season. 100 Yard Receiver (10) Gain 100 or more receiving yards with a single player. 100 Yard Rusher (10) Rush for 100 or more yards with a single player. 2 Sack Player (10) Make 2 sacks in a game with the same player. 200 Total Rushing Yards (15) Rush for 200 or more total yards in a game. 350 Total Passing Yards (15) Pass for 350 or more total yards in a game. 5 Star Recruiting (25) Sign 8 or more 5 star prospects in your recruit class. 50 Yard Field Goal (25) Kick a 50 or more yard field goal. 50 Yard Punt (15) Punt the ball 50 or more net yards. 500 Total Yards (25) Gain 500 total yards or more in a game. 60 Year Dynasty (100) Complete 60 years of Dynasty. All-American Level Earn 750 gamer points in the game. Allow No Sacks (15) Do not give up any sacks in a game. Block a Field Goal (25) Block a field goal. Block a Punt (25) Block a punt. Bowl Win (10) Win a bowl game in dynasty mode. Break a 30 Yard Run (10) Break a run for 30 or more yards. Break a 60 Yard Run (20) Break a run for 60 or more yards. Complete a 30 Yard Pass (10) Complete a pass for 30 or more yards. Complete a 60 Yard Pass (30) Complete a pass for 60 or more yards. Conference Champs! (10) Win a conference championship game. Dynasty Trifecta! (50) Win the National Championship in three back-to-back seasons in dynasty mode. Heisman Level Earn 1000 gamer points in the game. Heisman Memorial Trophy (25) Win the Heisman Memorial Trophy with a player on your dynasty team. Held Under 100 Yards (25) Hold the opposition to under 100 total yards. Held Under 200 Yards (10) Hold the opposition to under 200 total yards. High Score - Option Dash (40) Score 15,000 or more points in Option Dash. Intercept 2 Passes (15) Intercept 2 passes in a game on defense. Junior Varsity Level Earn 250 gamer points in the game. Kickoff Return for TD (20) Return a kickoff for a touchdown. Make 4 Sacks (20) Sack the opposing quarterback 4 or more times in a game. Mr. February (25) Have the #1 ranked recruiting class in a dynasty season. National Champions! (25) Lead your team to a BCS championship in dynasty mode. No Fumbles in a Game (15) Do not fumble the ball in a game. No Interceptions in a Game (15) Do not throw an interception in a game. Pass to 5 Different Receivers (10) Complete a pass to 5 or more receivers in a game. Perfect Game (40) Bowl a 300 Game Punt Return for TD (15) Return a punt for a touchdown. Recover 2 Fumbles (15) Recover 2 fumbles on defense in a game. Return Fumble for TD (20) Score a touchdown after recovering a fumble on defense. Return Interception for a TD (20) Return an interception for a touchdown. Score 35 Points (15) Score 35 points or more in a game. Score a Safety (30) Score a safety on defense. Shutout (30) Prevent your opponent from scoring any points in a game. Throw 4 TD Passes in a Game (15) Throw 4 touchdown passes in a single game. Undefeated (10) Go undefeated during a season in dynasty mode. Varsity Level Earn 500 gamer points in the game. Win by 21 (10) Win a game by 21 points or more. Win Tug-of-War (40) Win the Tug-of-War mini-game.