Required games for a new gamer
I've got a friend who has been out of gaming for basically a decade for a variety of reasons. However she finally has a machine capable of playing modern games and the time to play them.
What I'm trying to get a set of games that can be considered "required gaming" to play. Obviously she won't enjoy some and I'll avoid the genre in the future but I'd love to hear opinions on what needs to be played.
So far I've got: Half-Life 1/2, Diablo 2, Portal 1/2, Mass Effect 1/2.