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 wonX-TREME Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the X-TREME difficulty 21 March 2015 - Add a guideX-TREME Astro AdmiralGet an Astro Admiral rank on all the levels in the X-TREME difficulty 21 March 2015 - Add a guideTough Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Tough difficulty 18 March 2015 - Add a guideTough Astro AdmiralGet an Astro Admiral rank on all the levels in the Tough difficulty 18 March 2015 - Add a guidePro Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Pro difficulty 17 March 2015 - Add a guidePro Astro AdmiralGet an Astro Admiral rank on all the levels in the Pro difficulty 17 March 2015 - Add a guideMediumcore Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Mediumcore difficulty 15 January 2015 - Add a guideMediumcore Astro AdmiralGet an Astro Admiral rank on all the levels in the Mediumcore difficulty 15 January 2015 - Add a guideCasual Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Casual difficulty 18 December 2014 - Add a guideCasual Astro AdmiralGet an Astro Admiral rank on all the levels in the Casual difficulty 18 December 2014 - Add a guideBeginner Continuum CaptainGet a Continuum Captain rank or higher on all the levels in the Beginner difficulty 18 December 2014 - Add a guideBeginner Astro AdmiralGet an Astro Admiral rank on all the levels in the Beginner difficulty 18 December 2014 - Add a guideAll Challenges CompletedComplete all the challenges in challenge mode 17 December 2014 - Add a guideChallenge Mode CompleteGet to the end of the challenge mode map 12 July 2014 - Add a guideBeginner Campaign CompleteBeat the game on the Beginner difficulty or harder 27 May 2014 - Add a guideCasual Campaign CompleteBeat the game on the Casual difficulty or harder 27 May 2014 - Add a guideMediumcore Campaign CompleteBeat the game on the Mediumcore difficulty or harder 27 May 2014 - Add a guidePro Campaign CompleteBeat the game on the Pro difficulty or harder 27 May 2014 - Add a guideTough Campaign CompleteBeat the game on the Tough difficulty or harder 27 May 2014 - Add a guideX-TREME Campaign CompleteBeat the game on the X-TREME difficulty 27 May 2014 - Add a guide50 Challenges CompletedComplete 50 challenges in challenge mode 04 February 2014 - Add a guide