Here is the full list of all 41 ARMED SEVEN achievements.
Finish three stages in row without being damaged on any difficulty mode.
Destroy 25,000 enemies.
Time out a stage boss on any difficulty mode.
Finish two stages in a row without being damaged on any difficulty mode.
Use Charge Weapons 500 times.
Watch a replay. (Replays are only saved if you avoid using the Continue option!)
Use each weapon at least once on any difficulty mode.
Destroy 12,500 enemies.
Use Charge Weapons 250 times.
Use Charge Weapons 100 times.
Destroy 5,000 enemies.
Play and clear any stage in the Stage Select Mode.
Destroy 2,500 enemies.
Obtain the Blue Gargoyle Emblem.
Destroy the Unknown Threat ARMED SEVEN on any difficulty mode.
Defeat Heavy Manned Combat Robot LUNAR KAISER on any difficulty mode.
Attack and destroy the Space Fortress MAGINOT on any difficulty mode.
Destroy Heavy Manned Combat Robot VANGUARD on any difficulty mode.
Finish up a stage without being damaged on any difficulty mode.
Destroy the Ticonderoga Class Land Ship VINCENNES on any difficulty mode.
Destroy 500 enemies.
Defeat Alien Experimental Technology Robot KAIDOCKER on any difficulty mode.
Destroy Heavy Manned Combat Robot SPIRIT on any difficulty mode.
Defeat any stage boss with at least 10 seconds remaining in the timer on any difficulty mode.
Your Surveyor exploded for the first time. Try to avoid this. We don't have many replacements.
Destroy 50,000 enemies.
Obtain the Blue Griffin Emblem.
Obtain the Blue Chimera Emblem.
Obtain the Blue Dragon Emblem.
Obtain the Copper Gargoyle Emblem.
Obtain the Copper Griffin Emblem.
Obtain the Copper Chimera Emblem.
Obtain the Copper Dragon Emblem.
Obtain the Silver Gargoyle Emblem.
Obtain the Silver Griffin Emblem.
Obtain the Silver Chimera Emblem.
Obtain the Silver Dragon Emblem.
Obtain the Gold Gargoyle Emblem.
Obtain the Gold Griffin Emblem.
Obtain the Gold Chimera Emblem.
Obtain the Gold Dragon Emblem.