No missable achievements (plus 36 unknown)
Sign in with Steam or Xbox to track your progress, and:
Achieve a multiplier of 500x
Complete Stage 1
Destroy 1000 enemies using the bullets
Retry from the Game Over screen
Complete Stage 2
Kill 3000 enemies
Destroy 50 enemies with one lightning charge
Complete Stage 3
Destroy 1000 enemies using the beam
Complete Stage 4
Complete any stage without using the beam
Complete Stage 5
Complete all stages on Easy difficulty (or higher)
Complete any stage without using the shield
Keep the beam locked continuously on a single enemy for 30 seconds
Block 500 bullets with the shield
Complete any stage without using bullets
Reach the boss of a stage without firing any weapons
Kill 20,000 enemies
Sustain a multiplier of 500x for 30 seconds
Complete Stage 3 in Attrition mode
Complete all stages on Normal difficulty (or higher)
Complete Attrition mode on Easy difficulty (or higher)
Reach the boss of a stage without firing any weapons, using any shields, or dying on Normal difficulty or higher
Block 50 bullets with a single use of the shield
Destroy all of the large armada ships in Stage 3 on Normal difficulty or higher
Complete Stage 3 in Survival mode
Complete Attrition mode on Normal difficulty (or higher)
Complete Survival mode on Easy difficulty (or higher)
Complete all stages on Hard difficulty
Complete Stage 4 without shield-blocking or being hit by any purple homing bullets on Normal difficulty or higher.
Complete Attrition mode on Hard difficulty
Complete Survival mode on Hard difficulty
Complete Survival mode on Normal difficulty (or higher)