It’s also going to depend on what your graphic card can handle. Some games need more ram but your card can pick up the slack, and vice versa.

Blasphemous
Rainworld
Axiom Verge
Sonic Mania
Spelunky / Spelunky 2

Rimworld
Stardew Valley
Sunless Skies
Project Zomboid
Don’t Starve

Mini Metro
Pathfinder Wrath of the Righteous
Warhammer 40k Relics of War
Alan Wake

Outward
The Witcher 3
Slay the Spire
Fear and Hunger: Termina
Alien Isolation
Black Flag

Dragons Dogma: Dark Arisen
Faster than Light
Hardspace: Shipbreaker
Kingdom Come: Deliverance

Outer Wilds
Prey
Space Engineers
Steamworld Heist
Space Haven
Subnautica

Xcom 2 War of the Chosen
Troubleshooter
Cities Skylines
Doom
The Forest
Valheim

Halo: Master Chief Collection
Hollow Knight
Kenshi
Mad Max
Metro Last Light
No Man’s Sky
Portal/Portal 2

State of Decay Year One
Stellaris
Total War: Warhammer II

Arx Fatalis, Bad North, Binding of Isaac, Brigador, Deep rock galactic, Shadow of Chernobyl, Stellaris, The Talos Principle, Stardew Valley, Cult of the lamb, Grim Dawn, Transistor, Monaco…

And probably a good deal more. Just a few of the ones I like off the top of my head.

What others said, but also:

• Celeste
• Nine Sols
• Factorio
• Minecraft (I enjoy modded a lot but it might be hard to make that work with 8gb of ram depending on the modpack)
• Dead Cells
• Rivals of Aether
• Terraria
• Ori (both games)

Also seconding Outer Wilds because that was genuinely one of my favorite games of all time. Don’t look up anything about it though! It’s one of those games that will get ruined if it’s spoiled for you.