The Winter Sale goes 8 days still, so you have plenty of time. Some games in example from EA and Ubisoft require additional launcher or an account to play them. I usually avoid them.
Steam Deck Verified: 5 games including Cyberpunk for total $47,8
- Cyberpunk: $ 21
- Ace Combat 7: $4.80
- Resident Evil 2: $10
- Subnautica: $8
- Disco Elysium - The Final Cut: $4
More interesting Steam Deck Verified games
- Hollow Knight: $7.50
- Stardew Valley: $9
- Maneater: $4
- Divinity Original Sin Enhanced Edition: $4
Also have a look at games that require additional account or launcher:
- Red Dead Redemption 2: $ 15 (Steam Deck Playable, Requires 3rd-Party Account: Rockstar Games)
- Halo Master Chief Collection: $10 (Steam Deck Verified, Requires 3rd-Party Account: Xbox Live)