Just one or two? Wow. That's uh, that's tough. Definitely an early 2D Super Mario game. Maybe SMB3. While the original is one of the most important games ever and World 1-1 is a classic master class in level design, the game's difficulty curve might be a bit too much for someone unfamiliar with games. SMB3 is more forgiving and it's more generous with 1-ups. It also has a wider variety of power-ups and environments than World does. It basically takes everything awesome about the original and makes it better.

As for the other one, maybe Mario 64. It was to 3D platformers what the original SMB was to 2D platformers. It really set the bar for the genre, and it holds up incredibly well IMO, which is something very few games from that era can say.

Don't Shit your pants. It teaches everyone how to not shit their pants or if you want. How to shit your pants.

Etrian Odyssey 4.

It's such an awesome mix of Monster Hunter, Final Fantasy and Wizardry. Almost nobody has heard of it or plays it. It is literally the best game on the 3DS by a country mile. You explore a bunch of grid-based mazes. You can draw your own map as you explore ala Wizardry or other PC games that required graph paper. Except this game uses the 2nd screen as your map and makes it way faster and easier. The game is extremely difficult but in a good way. Like Monster Hunter you have to collect Monster parts to make better gear, and you can be ambushed by creatures you aren't ready to fight. The combat system is excellent allowing you to do all sorts of crazy things to boss monsters.

Lots of old games have fantastic graphics. 

The Witcher 3 in it's entirety along with the DLC at specifically the second highest or highest difficulty depending on skill level at games, let's call these two difficulties normal and hard mode.

Said it before, but got inspired to make a music video since.

GT7 in VR needs to be experienced!

I matched my footage of the best parts of my 24 hour race around Sarthe to music from Above and Beyond (recorded from Audi Trip). Best enjoyed with headphones in the evening/night. The sparks at night are mesmerizing. Followed by the most amazing sunrise, one of those you had be there.

Now I wonder what weather settings PD used so I can create shorter custom sunrise races :) And with cars with bigger windshields!