Half-Life 2: VR Mod has native sitting support in the options and plays perfectly with it enabled.

Much like it's predecessor, Bonelab is another gold standard for how to do sitting in VR. Use the right analogue stick to smoothly move between standing and crouching no matter your real life position

It's probably obvious that sitting in a game called Tabletop Simulator is a given. The controls can be weird depending on your controller, but playing while sitting or standing is essentially the same

The VR mode has some issues, but as far as sitting goes, it plays fine. You can reset your position on the fly and you can grab objects from a distance.

H3VR can be played while sitting, but you may be short and will struggle with reaching for items. Playspace mover highly recommended.

Somewhat obviously is designed for seated-VR only. You can adjust your seat height and the locations of the flight stick and throttle in-game.

Has native sitting support and is another gold-standard on how to do sitting VR in the same vein as Alyx and Boneworks.

This is a dedicated playspace mover targeted for people with disabilities. Completely free. Has several options OVAS doesn't have, including hand tracking. Essential for people who *unable* stand!

Based on the demo, the game plays fine sitting if you don't mind being short. You may want a playspace mover but it's not necessary.

Beat Saber has native sitting support and plays perfectly. Just be sure you have enough room to swing your arms.