Just for reference: https://www.mobygames.com/browse/games/windows/ has a huge database of video games.

Also, assuming your child plays with real life friends I don't know how much sense it would make to suggest alternatives to Roblox (group dynamics, network effects and all), but something like Terraria, Starbound, Minecraft or even Garry's Mod would fit here.

See also searching by tags on Steam: https://store.steampowered.com/search/?tags=3859,3810 (here: Sandbox, Multiplayer)

Roblox costs less money and those games are actually targetted at kids. Really, new games cost a lot and steam discounts on aggregate cost more.

Plus, competitive online pc gaming is something I dont want my kids near to. Mostly because of culture and addictive nature of it.

Speaking of addiction, worst are MMO like games, things like league of legends or world of warcraft. I dont want my kids to play any of that, these games tend to consume whole person.

Roblox is safe and age appropriate.

My kids play Minecraft on the switch (creative mode), and they absolutely love it. I think it's a bit addicting, but I don't mind since it's essentially virtual legos.

I’m a parent who plays roblox (mostly Arsenal) with my kids :)

Retrogaming