This issue is a variant of Irredeemable (Boom! Studios, 2009 series) #5. There exist further variants.
Per indicia: Copyright  Boom! Studios. Printed in Canada. // This issue shipped with different four covers and a special promotional price of 99 cents. 50% of retailers' orders were filled with Cover A, 25% with Cover B, and 25% with Cover C, while one copy of Cover D was sent to retailers as an incentive for every ten standard copies ordered.
The inside front cover has head shots of cast from previous issues and recap of story so far, plus logo, credits, and indicia set against negative red-&-black detail of #1's Cover A.
Story is untitled beyond series title. First page shows Plutonian walking through trophy room.