Bejeweled
Swap two gems, line up three, watch them vanish and the rest cascade down. PopCap's match-three puzzle turned a simple web game into one of the most-copied ideas in casual gaming.
#Popcap
2 items
Peggle
Aim a ball at a field of pegs, pray for the bounce, and when the last orange peg falls the game slows down, zooms in, shouts "EXTREME FEVER" and plays Beethoven's "Ode to Joy" at you. PopCap's February 2007 pachinko-with-unicorns sold slowly until Valve tucked a free version into The Orange Box, and then it passed 50 million downloads.