Gaming desktop selection help?

So I'm thinking of buying a gaming desktop PC. Within the 800$ price range.
I want a PC that will run smoothly for games.
Here are some games that are example of what I wanna play on it
Besiege
Spore
Gmod
Tf2
Minecraft
Terraria
Kernel space program
Subnautica
These are samples of games I really want to play but need good Desktop recommendations in the 800$ price range? Help is EXTREMELY appreciated.

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