If you see a website offering a or a "free install for PC" that requires you to disable your antivirus, do not click it .
However, if you want a Borderlands style game for free, check the Epic Games Store weekly giveaways or Steam’s free weekends. That is a different "Borderland" entirely. Perhaps "free install" is a metaphor. You want to install the story into your brain. The original manga by Haro Aso is the definitive version of Alice in Borderland.
There is no official "Alice in Borderland" PC or console video game (yet). However, depending on your intent, the "free install" could refer to three distinct things: the , the VPN to watch the show for free , or safe emulation of the classic arcade games that inspired the series.