The problem is there isn't a large enough retail demand to bring in some of these games unfortunately in Nigeria. Imagine yourself as a video game retailer, in order to get discounts you buy in bulk hence probably 50+ copies for one game potentially. This is difficult amount of games to sell due to the logistics situation in the country (you would probably be limited to intra-state sales) and economy (video games are seen as a luxury good). Only very popular games such as FIFA worth having in bulk to sell. Other's are not financially beneficial to the seller.