Added Serenity, since it's characters and situations were based on Joss Whedon's earlier scenario for Alien: Resurrection. Also, Serenity bears the familiar Weyland-Yutani logo, so it's immediately in the same universe as most of the films listed here.

Updated to add Soldier, Screamers and Total Recall, all of which fit into the PK Dick canon with Blade Runner, apparently.

This list doesn't appear to make much sense, and it really doesn't. I'm going off of the vague assumption that all of these films occur in the same universe. Blade Runner is connected to Prometheus, which is connected to Alien, which is connected to Predator. Avatar references Aliens. Anyway, a fun list based on the most threadbare connections, to be sure.