Looking for Fps games that are solo

Hello so as the title says am looking for some fps games that are solo.

If the game is actually a multiplayer game like deep rock galactic, payday, etc but still has a enjoyable solo mode thats still awesome to me

I also really like games that have many content like lots of guns, missions, enemy types etc..

I dont care that much about story, if it has one okay nice, but if it doesn't have one, thats also okay.

Thanks 🙏