There Are 600+ Games In The Main Debian Repository

[Vistaus]

Off topic question: Does anyone know any polished 64bit Linux car racing games that don't require I install steam?

SuperTuxKart

[sarmad]

Off topic question: Does anyone know any polished 64bit Linux car racing games that don't require I install steam?

Not technically a Linux game, but with the nice packaging you can think of it as such:

https://snapcraft.io/tmnationsforever

Other than that this might be your best bet:

https://www.gog.com/game/flatout_2

[creative]

While not totally a racing game but more a demolition/derby type game Mad Max, you get to modify your cars and fist, so when you stop and get out you get to use your fists of fury and skull punching body stomping for maximum fun. Good game if you have built up anger. Very satisfying. Highly underrated game. I actually need to play it more often, honestly I think it's a gem that even though it has got some attention it is still not enough.

[DMJC]

Stunt Rally and TORCS are the two that I always think of for open source racing. SuperTuxKart is more like a Mario Kart game. Fun, but not very car-enthusiast.TORCS could use a content facelift. Decent engine, just needs some better art asset import tools and a level editor.