It's coming up to 20 years since Half-Life 2, quite an important video game, was released on PC. It's time to dust off the crowbar and discover some physics once more.
Half-Life 2
Several years after the Black Mesa disaster, Gordon Freeman awakens from stasis to aid a resistance movement against the Combine, a collective of trans-dimensional aliens that have conquered Earth.
Gordon has a bit of a helicopter problem. They love a bit of him!