Space Marine 2 was a massive success that trumped expectations. With that in mind, it shouldn't come as a surprise to learn that a third game is already in development. Space Marine 3 will be developed by Saber,

Focus Entertainment and Saber Interactive confirmed they have strated work on Warhammer 40,000: Space Marine 3, coming in the future

"We’re pleased to announce that the development for Warhammer 40,000: Space Marine 3 has officially begun at Focus Entertainment, Saber Interactive and Games Workshop," reads a statement. "We’ll share updates on this new title when the time is right. For now, our focus remains on delivering the best possible experience for Space Marine 2 players."