[gharbad]

Portal: Narbacular Drop

Wolfenstein 3d: Catacomb 3d

Note- I'm not certain that the games on the right are the originators of the genre of games on the left, but they certainly came prior.

[Chinjut]

The games on the right certainly are the originators of the games on the left; in fact, in both cases, the developers of the game on the right were the very team which followed up by developing the game on the left.