An interesting mix of RPG and first-person shooter styles, you play a soldier who wakes up from cryo-sleep in an eerie spaceship. We’re throwing it back with this one! System Shock 2 was first released in 1999, but the game has held up over the years. Whether you’re in the mood to stop an invasion or to explore a new planet, there’s sure to be something here for you. The following list gives you 20 great games you can play on your PC in a loose-to-meaningless order. Plus, aliens can be good or evil, so there are plenty of options. Games featuring aliens have an open canvas to create all sorts of creatures: small or gigantic, slimy or furry, intelligent or mindless. There could be anything out there on the edges of the universe.
