Sims is the best selling.
But the popular ones are the ones from developers like Blizzard and Valve.
It seems to be P0rtal these days...
DrPixel and Zenphic r both rite. it depends on where u r and how many copies hav been made and sold.lets take minecraft 4 example it started out in i think eroupe and came over here to america im not sure im using wat I KNO here.Notch the creator having a ball that minecraft has already sold about 1 billion copies of minecraft in like 2 years.as 4 the rest of the coutries im not sure how popular minecraft is in the other coutries.but if i had to choose my favorite video game/flash game/cpu game watever game i would choose world of warcraft with a close second call of duty (the WHOLE siries blackops and warfare)and a close third saimts row 1 2 and 3 with a close 4th of terraria nad 5th being minecraft!!!thank u 4 your time but u probably just relized u just wasted a minute of your life that u will never get bak by reading this cause u just read sucky information cus im a moron and if u r still reading this WTF!!!!QUIT WASTING YOUR LIFE NOW!!!I SAID NOW!!!NOW OR ILL CUT YOU THROAT WHILE U R SLEEPIN CUS I KNOW WHERE AND I KNO WHERE U SLEEP!!!..........IM NOT CRAZY OR A STALKER!!!!!!!!!!!!!!!!!BAI!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!