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Use "single-player" in a sentence
"One upcoming title, Red Orchestra: Heroes of Stalingrad, will allow gamers to choose between the Germany and Soviet sides in multiple and single-player modes -- but Stalin's USSR was not exactly on the side of the angels."
"Or yet another single-player game rendered inoperable by remote server failure -- but only for legitimate users?"
"But the Super Mario Bros. series has always been a single-player game — one at a time."