Worthless singleplayer with a story that seems to been done on a coffee break. In singleplayer you explore four different episodes with a number of levels and the goal of each level I simply to shoot your way to the exit. At the end of each episode you find a magic rune that you take with you and when you have all four runes a secret path in the hub that connects all the episodes open up and you can go and kill Shub-Niggurath, the final boss. The singleplayer campaign can also be played in co-op and it makes it a bit more fun :).
Multiplayer is deathmatch and fun but the thing that made Quake epic was how easy it was to modify and the number of modifications that was made for the core game.
A fifth episode, Dimension of the past, was released for the Quake 20 years anniversary in 2016 by Machine Games.
Here I write what I think about the games I have played. The score is shown as a smiley before the title of the game.
Note about Movies: None of the Youtube movies that i link to are made by me and i include them only to give you a chance to see what the game looks like. Only the text and the smiley score act as my review of the game .