I love that some of these old threads are getting necroed. It’s like a time capsule.
I’ll give this one a crack.
1) Super Mario Bros. - It got me loving games
2) Ms. Pac-Man - It’s approachable and cute, but it’s difficult to master.
3) Madden (Newest year) - If you’ve never played games and are remotely into sports, Madden will blow your mind.
4) Tetris - This is a game anyone can love. It’s hard not to kinda enjoy Tetris. Its simplicity is perfect.
5) Red Dead Redemption II - Simply the greatest game ever created. It’s huge. There’s so much to do. And the story will get you in the feels.
6) Marvel Snap - It’s a free and addictive deck building game. I play it on my phone. It’s approachable and has tons of familiar characters
7) Portal 2 - Low stakes. Laid back. Good humor. Just a fun game.

Rock Band - Even folks that don’t play games love rhythm games. Plus, you get to feel like a rockstar!
9) Stardew Valley - Relaxed. No Stress. Simple. It’s like animal crossing, but better.
10) Legend of Zelda: Link to the Past - It’s an awesome adventure everyone can love. It’s my favorite Zelda game.