Steams download stats show that SA is the biggest market in Africa, even bigger than Maghreb countries [North Africa] combined. Namibia has more traffic than Kenya as well, as does most of the North. The big shocker/disappointment is Nigeria. On paper it should be the largest market by far and its barely got twice the activity of Zambia (170 million vs 14 million people). Piracy is obviously a factor but still.
http://store.steampowered.com/stats/content/
The SA gaming scene is pretty big though, the rAge expo says it all:
http://www.rageexpo.co.za/about-rage/








