Rovio had developed 51 games before Angry Birds.
That figure comes from Rovio’s pre-Angry Birds development history, which included work-for-hire projects, publishing contracts, and independently released titles. The company was not an overnight success: before its breakout franchise, it had built games for platforms such as Java ME, Nokia devices, N-Gage, and iOS.
The original Angry Birds was released in 2009 after Rovio had been struggling financially. Designer Jaakko Iisalo’s sketch of stylized, wingless birds inspired the concept, while the game’s structure drew on the physics-based destruction of Crush the Castle.
Some summaries describe the total more loosely as “over 50 games,” which can make the number seem uncertain. The more specific historical count used for Rovio’s pre-Angry Birds catalog is 51. The game’s success then transformed the small Finnish studio into the company behind a major multimedia franchise.