You like free? You like Call of Duty? Well you are in luck, person who likes both of those popular things.
This weekend only, you can play Call of Duty: Ghosts multiplayer and admire its incredible fish AI for free through Steam. You can also purchase the full game for $30, or 50 percent off its normal $60 list price.
Fair warning: I haven't played the PC version of Ghosts yet, but there was a fair amount of anger at launch due to poor optimization—frame dips and even freezes were common across hardware. I'm unclear what the status of the game is nowadays, but don't be surprised if the game doesn't perform as well as you'd expect on your hardware. But hey: Playing it for free is a great way to check!