Here is the full list of all 47 APOX achievements.
Player wins a game with the Super Gun. The player must destroy 3+ bases, supply the metal and fire the Super Gun too
Successfully built a Super Gun
Tank Truck Level 3
Sniper Level 3
Knife Weapon Level 3
Mortar Level 3
Machine Gun Car Level 3
Heavy Machine Gun Level 3
Flamer Level 3
Flame Car Level 3
Artillery Truck Level 3
Anti-Tank Level 3
Successfully built a Super Tank
Successfully built a Super Launcher
Rifle Level 3
RPG Level 3
3v3 Clan Tournament Winner
3v3 Tournament Winner
FFA is short for free-for-all. FFA is a game mode where there are three or more teams (normal games have exactly two teams)
Veteran player gets this for playing games with newcomers
Veteran player protects a noob from a rush
Award for winning 10 games in a row
Player is in the Hall Of Fame
Player wins a large FFA game
Player gets top score in a game with many players (and doesn't win any other award for the game)
2v2 Tournament Winner
Clan Tournament Winner
2v2 Clan Tournament Winner
1v1 Tournament Winner
1v1 Clan Tournament Winner
4v4 Tournament Winner
4v4 Clan Tournament Winner
Award for player getting a lot of ranking very quickly
FFA team means that there are three or more teams, and each team has more than one player in it. (in normal FFA games, each team has one player)
Winner of tournament not listed above
Player is losing really badly but somehow wins
Award for reaching the top ten in the leaderboard
Award for reaching the top 100 in the leaderboard
Award for reaching the top 1000 in the leaderboard
Player Of The Year
Player Of The Month
Player Of The Week
Rampage
Player plays a game against many bots (CPU players) and still wins
Player gets an award for telling his friend about the game
Winning game without losing a unit
Player defeats another player very, very quickly