Here is the full list of all 76 A.V.A. - there are Alliance of Valiant Arms achievements.
100 hours of playtime recorded in round based mission matches
100 hours of playtime recorded in Escort mission matches
10000 kills achieved with Sniper primary weapon
Level Up to Brigadier General
100 hours of playtime recorded in Military Drill mission matches
100 hours of playtime recorded in Infection mission matches
10000 kills achieved with Rifle Man primary weapon
100 hours of playtime recorded in Annihilation mission matches
1000 kills achieved with grenades
2500 kills achieved with secondary weapon
10000 kills achieved with Point Man primary weapon
Played at least 1 Domination Mission match
20 hours of playtime recorded in Military Drill mission matches
20 hours of playtime recorded in Infection mission matches
20 hours of playtime recorded in Escort mission matches
2500 kills achieved with Sniper primary weapon
500 kills achieved with secondary weapon
Level Up to Major Rank
2500 kills achieved with Point Man primary weapon
5 hours of playtime recorded in Military Drill mission matches
500 kills achieved with melee weapon
250 kills achieved with grenades
5 hours of playtime recorded in Infection mission matches
Played at least 1 Convoy Mission match
2500 Headshot kills achieved
Played at least 1 Cross Steal Mission match
20 hours of playtime recorded in round based mission matches
20 hours of playtime recorded in Annihilation mission matches
5000 deaths recorded in battle
2500 kills achieved with Rifle Man primary weapon
5 hours of playtime recorded in Escort mission matches
500 kills achieved with Point Man primary weapon
Level Up to Second Lieutenant Rank
500 kills achieved with Sniper primary weapon
100 kills achieved with secondary weapon
Played at least 1 Suppression Mission match
1 hour of playtime recorded in Military Drill mission matches
100 kills achieved with melee weapon
500 Headshot kills achieved
5 hours of playtime recorded in round based mission matches
Collected 15 medals or more
1000 deaths recorded in battle
Collected 15 kinds of badges at least once
Grenade 2
5 hours of playtime recorded in Annihilation mission matches
500 kills achieved with Rifle Man primary weapon
1 hour of playtime recorded in round based mission matches
100 kills achieved with Point Man primary weapon
1 hour of playtime recorded in Escort mission matches
100 kills achieved with Sniper primary weapon
Played at least 1 Free-For-All Mission match
Level Up to Staff Sergeant Rank
1 hour of playtime recorded in Infection mission matches
100 Headshot kills achieved
10 kills achieved with grenades
Played at least 1 AI Demolition Mission match
200 deaths recorded in battle
20 kills achieved with secondary weapon
1 hour of playtime recorded in Annihilation mission matches
Played at least 1 Infection Mission match
100 kills achieved with Rifle Man primary weapon
Played at least 1 Demolition Mission match
20 kills achieved with melee weapon
Played at least 1 Co-op Scenario Mission match
20 Headshot kills achieved
Played at least 1 Escort Mission match
5 kills achieved with melee weapon
50 deaths recorded in battle
1st time playing as a Sniper
1st time playing as a Rifle Man
Played at least 1 Escape Mission match
Successfully create a character
Level Up to Private Rank
Play Point Man
1st game played after creating character
Played at least 1 Annihilation Mission match