Full list of all 14 Dimension Tripper Neptune: TOP NEP achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Clear stage 1.
Clear stage 2.
Clear stage 3.
Clear stage 4.
Clear all the stages.
Achieve 100,000 points.
Achieve 150,000 points.
Achieve 200,000 points.
Gather all your allies.
Fight with two partners.
Obtain 500 coins.
Defeat 1000 enemies.
Clear all the stages without taking damage.
Obtain all achievements.