I’ve been a huge fan of halo my whole life and recently replayed the halo wars 1 campaign on steam hoping to unlock the nameplate for halo MCC but I never unlocked it after beating the campaign is this a known issue or am I missing something. Also the Halo Wars one campaign is worth replaying if you haven’t played it in years I really enjoyed my time on the game. Thank in advance guys and gals 
Hey OP, as far as I know you need to play on the Xbox One or Windows Store version of the Definitive edition to get the nameplate.