Here is the full list of all 26 Blade Assault achievements.
Clear Assault Level 3.
Summon [Jira] as Jenny.
Upgrade all passives taught by Jack to the maximum level.
Defeat the chapter 6 final boss, Ouranos.
Defeat the chapter 6 boss, Panus.
Defeat the chapter 6 Commander, Electra.
Increase all resistance member’s friendship levels to the maximum.
Defeat the chapter 5 boss, Cyclops.
Defeat the chapter 4 boss, Plantos.
Defeat the chapter 3 boss, Charlotte.
Defeat the chapter 2 boss, Ratmotan.
Wake up in Hank’s room after your first death.
Defeat the chapter 1 boss, Mac.
Wake up in Hank’s room after falling from Esperanza.
Clear Assault Level 5.
Clear Assault Level 8.
Clear Assault Level 10.
Acquire all types of Electric Cores.
Acquire all types of Ignition Cores.
Acquire all types of Cryo Cores.
Upgrade Kil’s weapon [Destroyer] to Lv.5.
Upgrade Kil’s weapon [Inquisitor] to Lv.5.
Upgrade Kil’s weapon [Evil Hunter] to Lv.5.
Upgrade Darcy’s weapon [Silence] to Lv.5.
Upgrade Jenny’s weapon [Sidewinder] to Lv.5.
Acquire all types of Gears.