![Starsiege: Tribes was an online shooter that stressed vertical movement and twitchy shooting. (Moby Games image) (Moby Games)](https://thumb.spokesman.com/uO6q6eDqVn9RLDznlEJuDvMVKgE=/600x0/media.spokesman.com/graphics/2018/07/sr-loader.png)
This week's free game: 'Starsiege: Tribes'
Twitchy shooters and the PC go together like honey and peanut butter. Here's one of the early classics of the genre, with a raging online community that continues to support the game more than a decade after launch.