My aspie son is 9 1/2 and was also a late developer in creative play. When Mr. E was 4, we gave him a G.I. Joe figure... he looked at us very seriously and said, "Why would anyone want a pretend person?".
It has just been in the last year that he has started engaging in pretend play - while I know it's a positive thing, it feels uncomfortable because he only does it with younger kids, and his peers are all beyond it at this point. He's just on a different curve than most, I guess! But yeah, role playing /gaming is a great example of how adults STILL play pretend. Great example! 
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Mom to two incredible boys: Mr. E (9 years old, dx AS & ADHD) and young EZ (5 years old, NT).