The future of Microsoft's long running Flight Simulator series has been cast into doubt, after the software maker US laid-off the entire development team.
Microsoft says it is "committed" to the series, despite shutting the Aces studio when it cut 5000 jobs.
But third party developers say Microsoft needs to outline its plans for the game in more detail.
MS Flight Simulator is arguably the longest running computer game series ever, first launched back in 1982.
Nels Anderson, founder of enthusiast website FlightSim.com said the studio closure was a "dark day" for the flight sim market.
Speaking to the BBC he said he was baffled by the decision.
"Microsoft have apparently cancelled a 27 year franchise. Flight sims were one of the few things about Microsoft people actually liked. It made them money and had an enormous following.
"To cancel something like that is an amazing thing to do," he said.
