Suggest Me Replayable Singleplayer PC Games That Will Work Well With My Computer: i7 4770 CPU, 1660 Ti GPU, 32 GB DDR3 Ram, 870 EVO SSD (OS/PC Games/Programs), And 860 EVO SSD (More PC Games)

These get a LOT of play time off me.
Few hundred to over 1 thousand hours each.

• Dwarf Fortress
• Ostranauts
• Caves of Qud
• Elin
• Hardspace: Shipbreaker
• Starsector

Hardspace has the highest requirements of the bunch, and Dwarf Fortress will slow your pc down majorly when it's doing it's world building phase.

If you're willing to play on low, a lot of games should run. I played Baldur's Gate 3 on a similar build on about 1080p medium settings

Factorio.

• Mindustry (based on what I've read about it)
• Plants vs. Zombies
• RimWorld
• Shattered Pixel Dungeon
• Sid Meier's Civilization IV, or Civilization V: Brave New World
• Sid Meier's Pirates!
• Wildermyth

Into The Breach. Same developer as FTL. Great game!

Binding of Isaac. Greatest roguelike ever

I have an i7-4790k and have yet to find a game it won't play well, although I do tend to avoid the absolute bleeding edge when it comes to graphic settings. They were great CPUs and still are among the fastest at single-thread performance, which is what games care about more than anything else, while still having enough cores to not bottleneck on secondary threads.

As for game recommendations, both Cyberpunk 2077 and Baldur's Gate 3 are recent favourites of mine with more replayability than their narrative would suggest.

For pure replayability though, nothing beats games like Factorio (THE FACTORY MUST GROW) or Kerbal Space Program (not 2) or Satisfactory, and basically any Roguelike/Roguelite. If you haven't played Balatro go do that right away, it is crazy deep and will run on a potato.

Other games I keep coming back to and then getting addicted to for awhile for no obvious reason other than their replayability include regularly updated exploration/build/craft games like No Man's Sky, Avorion, Astroneer, and Empyrion: Galactic Survival, Aska, and strategy games like Civilization 5/6, Stellaris, Crusader Kings 2/3, or XCOM.

Hope that helps!

FarCry series is pretty fun and can often be found on sale for super cheap on Steam.

Here's a few ideas of games that I think will work on your system. Putting in some variety since it looks like you play different game styles.

FPS- Wolfenstein New Colossus, Old Blood and New Order (Skip Youngblood)

Stealth -Dishonored 2, Styx Master of Shadows

Dungeon crawler/roguelike - Cult of the Lamb

Rpg/Turn based combat - South Park stick of truth

Any Civilization. I like 5.

The Sims 2 is super replayable, and requires only modest specs.

I've been playing Titan Quest and Grim Dawn for years. Not everyone likes isometrics, though.