Reach the first tunnel system by following the lower path only
Complete the 1st Tunnel until the boss without ducking anywere except the 3rd room (duck and fire) and without dying
Complete the 2nd Tunnel until the boss without ducking anywere except the 3rd room (duck and fire) and without dying
Complete the 1st Tunnel until the boss with 50 sec or more remaining
Finish the 1st Boss without destroying any of the 4 blue spheres
Defeat the boss at first outpost
Infiltrate the 2nd Outpost without destroying any of its side turrets
Complete the 2nd Tunnel until the boss with 60 sec or more remaining
Finish the 2nd Boss without dying
Defeat the boss at second outpost
Reach the heart at final level without pressing the left direction button or using invisibility
Defeat the heart in final level without destroying any of its nest's
Finish the game
Obtain the Scatter gun
Obtain the Riffle gun
Obtain the Laser gun
Score at least 50k points before the end of the game
Score at least 100k points before the end of the game
Score at least 150k points before the end of the game
Score at least 200k points before the end of the game