Victoria II - Victoria II is a Single and Multiplayer Grand Strategy video game developed and published by Paradox Interactive.
SpaceX Falcon 9 Lander - Try (and fail) to land Elon Musk's SpaceX rocket
Hearts of Iron IV - Hearts of Iron IV is a Real-time Strategy, War, Single and Multiplayer video game created and published by Paradox Interactive.
SpaceVR - Explore space with Oculus Rift (pre-launch)
Europa Universalis IV - Europa Universalis IV is a Historically, RTS, Sandbox, Combat, Single and Multiplayer video game developed and published by Paradox Interactive.
The Size of Space - An interactive visualization of the universe