I would put in half-life meself. Unless the extra Eps don't count.

OH no haha.  Burnout Revenge was a tragedy haha.  Burnout 1 actually wan't even that great of a game.  Kinda new, but it wasn't til Point of Impact that it was a real solid release.  Then Burnout 3 made it legendary in the racing genre.  Revenge, well took all that away, while Paradise retunred to form whil.e also forgetting its roots and open world concept I didn't like.  So no, I wouldn't say a 3 out of 5 flies haha. 

Now I obviously agree with Legend of Zelda, Mario platformers, Pokemon, Halo, Metal Gear Solid, etc.  I'd also throw in there Grand Theft Auto, Elder Scrolls, and a few others I can't think of at the time.  Man if it hadn't have been for RE5 (and simply just not tossing in Code Veronica because not having a number behind it), Resident Evil would have easily been in there.  Curses Capcom haha.

I don't think they count. Main-line only. The eps are merely expansion packs in my view.

Dynasty Warriors.

Ace Combat is a great series.
So is Street Fighter.
And Mario Kart.

Baldur's Gate. With Throne of Bhaal basically being Baldur's Gate 3, there are at least 3 entries.

You could probably say Zelda

Well, how about Mass Effect? Doubt 3 won't deliver. God of War maybe?

everything on there is fine except for Prince of Persia. All the other games you pretty much know what you're getting when you buy it, if you like that type of game it's gonna be really good.

Phoenix Wright!