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.
Achieve 200,000 points.
Defeat 1000 enemies.
Obtain 500 coins.
Achieve 100,000 points.
Achieve 150,000 points.
Clear all the stages.
Gather all your allies.
Fight with two partners.
Clear stage 4.
Clear stage 3.
Clear stage 2.
Clear stage 1.
Clear all the stages without taking damage.
Obtain all achievements.