Here is the full list of all 40 Energy Hunter Boy achievements.
You have passed the level 1
You have completed the campaign 1
You have completed the campaign 2
You have completed the campaign 3
You killed 50 enemies
You killed 100 enemies
You killed 500 enemies
You have deactivated 10 generators
You have deactivated 50 generators
You have deactivated 100 generators
You have deactivated 500 generators
You have fired 1000 shots
You have fired 2000 shots
You have fired 3000 shots
You have fired 5000 shots
You have fired 10000 shots
You have killed 10 enemies in one mission
You have killed 20 enemies in one mission
You have killed 30 enemies in one mission
You have killed 40 enemies in one mission
You have killed 50 enemies in one mission
You have fired 100 shots in one mission
You have fired 200 shots in one mission
You have fired 300 shots in one mission
You have fired 500 shots in one mission
You have fired 1000 shots in one mission
You have gained 1 million points
You have gained 5 million points
You have gained 10 million points
You have gained 25 million points
You have gained 50 million points
You have passed the level 10
You have passed the level 30
You have passed the level 50
You have passed the level 70
You have passed the level 100
You have reached the skill level 2
You have reached the skill level 3
You have reached the skill level 4
You have reached the skill level 5