Here is the full list of all 30 Altorius achievements.
Journey: Complete 12 levels
Journey: Complete 24 levels
Journey: Complete all levels (Normal difficulty)
Journey: Complete all levels (Hard difficulty)
Journey: Complete all levels (Ultra difficulty)
Journey: Collect 1 Secret
Journey: Collect 24 Secrets
Journey: Collect 48 Secrets
Journey: Fully upgrade the Cannon
Journey: Fully upgrade the Laser
Journey: Fully upgrade the Bounce
Journey: Fully upgrade the Rocket
Arcade: Collect 1 Medal
Arcade: Collect 10 Medals
Arcade: Collect 21 Medals
Arcade: Collect 42 Medals
Arcade: Collect every Bronze Medal
Arcade: Collect every Silver Medal
Arcade: Collect every Gold Medal
Fire 5,000 bullets
Fire 10,000 bullets
Fire 20,000 bullets
Use 50 Shields
Use 50 Bombs
Use 50 Boosts
Use 50 Phases
Use 100 Shields
Use 100 Bombs
Use 100 Boosts
Use 100 Phases