This deck contains 199 (aka almost all) countries of the world as country-name/country-outline-on-a-map pairs. The front of the card shows country name and an empty map of a larger geographic region, the back of the card shows the country marked in red, but without the country name. So the cards can be used front-to-back ("Where is this country?") and back-to-front ("Name that country!").
The country names and map data were taken from the package "rworldmap" of the R statistical computing environment. I made small modifications like fixing typos in country names, and removing some small islands I didn't want to learn. The resulting collection contains 199 sovereign countries, dependent countries, and regions of disputed/indeterminate status.
Please report any inaccuracies. Contact me if you are interested in the R code.
 South, Andy 2011 rworldmap: A New R package for Mapping Global Data. The R Journal Vol. 3/1 : 35-43. URL http://journal.r-project.org/archive/2011-1/RJournal_2011-1_South.pdf
 R Core Team (2017). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL https://www.R-project.org/.