Russia and Brazil are far and away the fastest-growing markets for Steam software sales, according to 2013 sales revenue data from Valve Software.
The data, sent out by Valve during its Steam Dev Days event, suggests that Europe and North America still dominate the market when it comes to buying PC games digitally, accounting for a combined 81 percent (40 and 41 percent, respectively) of Steam's global revenue.
If you look at the data for signs of emerging markets, however, Steam saw the biggest growth in revenue from users in Russia and Brazil. With year-over-year growth rates of 128 percent and 75 percent (respectively), it seems like Eastern Europe and South America might be underserved up-and-coming markets for PC game developers.
Valve included the chart as part of a press release that also confirmed Steam has over 75 million active accounts
, a nearly 15 percent increase from the 65 million it had last October.
And if you prefer bar charts as opposed to pies, look at the data from this vantage point: