Retro/Grade Achievements Here is the full list of all 21 Retro/Grade achievements.Filter Achievement View View Image viewList view Sort by Won first then 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 AllWonNot wonBeginner Campaign CompleteBeat the game on the Beginner difficulty or harder 21 September 2014 - Add a guideCasual Campaign CompleteBeat the game on the Casual difficulty or harder 21 September 2014 - Add a guideMediumcore Campaign CompleteBeat the game on the Mediumcore difficulty or harder 21 September 2014 - Add a guidePro Campaign CompleteBeat the game on the Pro difficulty or harder 21 September 2014 - Add a guideTough Campaign CompleteBeat the game on the Tough difficulty or harder Locked - Add a guideX-TREME Campaign CompleteBeat the game on the X-TREME difficulty Locked - Add a guideBeginner Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Beginner difficulty Locked - Add a guideCasual Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Casual difficulty Locked - Add a guideMediumcore Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Mediumcore difficulty Locked - Add a guidePro Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Pro difficulty Locked - Add a guideTough Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Tough difficulty Locked - Add a guideX-TREME Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the X-TREME difficulty Locked - Add a guideBeginner Astro AdmiralGet an Astro Admiral rank on all the levels in the Beginner difficulty Locked - Add a guideCasual Astro AdmiralGet an Astro Admiral rank on all the levels in the Casual difficulty Locked - Add a guideMediumcore Astro AdmiralGet an Astro Admiral rank on all the levels in the Mediumcore difficulty Locked - Add a guidePro Astro AdmiralGet an Astro Admiral rank on all the levels in the Pro difficulty Locked - Add a guideTough Astro AdmiralGet an Astro Admiral rank on all the levels in the Tough difficulty Locked - Add a guideX-TREME Astro AdmiralGet an Astro Admiral rank on all the levels in the X-TREME difficulty Locked - Add a guideChallenge Mode CompleteGet to the end of the challenge mode map Locked - Add a guide50 Challenges CompletedComplete 50 challenges in challenge mode Locked - Add a guideAll Challenges CompletedComplete all the challenges in challenge mode Locked - Add a guide