Possible to upgrade to Digital Deluxe for $10 more?

roper512

Chieftain
Joined
Sep 23, 2010
Messages
1
I ended up plunking down for the basic version of Civ5 on steam but did not fully read what was contained in the digital deluxe version.. Is it possible to pay to "upgrade" to the digital deluxe through steam or am I out of luck?

Thanks
 
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