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Left 4 Dead series (Xbox 360/PC/Mac/Linux)

It’s been over a decade since ‘Left 4 Dead 2’ dropped and the video game still has an audience. However, there’s growing concern over its longevity. The first game deserves its praise for kickstarting the zombie slaughter fest but expired due to a shrunken player count. And while it lives on as a free add-on to its successor, it too will eventually expire. Furthermore, Valve admitted that ‘Left 4 Dead 3’ isn’t in development and that makes sense given they “can’t count to 3.”