Retro/Grade Achievements Here is the full list of all 21 Retro/Grade achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc What are achievement flags? Click to find outApply Beginner Campaign CompleteBeat the game on the Beginner difficulty or harder Casual Campaign CompleteBeat the game on the Casual difficulty or harder Mediumcore Campaign CompleteBeat the game on the Mediumcore difficulty or harder Pro Campaign CompleteBeat the game on the Pro difficulty or harder Tough Campaign CompleteBeat the game on the Tough difficulty or harder X-TREME Campaign CompleteBeat the game on the X-TREME difficulty Beginner Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Beginner difficulty Casual Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Casual difficulty Mediumcore Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Mediumcore difficulty Pro Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Pro difficulty Tough Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Tough difficulty X-TREME Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the X-TREME difficulty Beginner Astro AdmiralGet an Astro Admiral rank on all the levels in the Beginner difficulty Casual Astro AdmiralGet an Astro Admiral rank on all the levels in the Casual difficulty Mediumcore Astro AdmiralGet an Astro Admiral rank on all the levels in the Mediumcore difficulty Pro Astro AdmiralGet an Astro Admiral rank on all the levels in the Pro difficulty Tough Astro AdmiralGet an Astro Admiral rank on all the levels in the Tough difficulty X-TREME Astro AdmiralGet an Astro Admiral rank on all the levels in the X-TREME difficulty Challenge Mode CompleteGet to the end of the challenge mode map 50 Challenges CompletedComplete 50 challenges in challenge mode All Challenges CompletedComplete all the challenges in challenge mode