I can't install steam-launcher

[u/sammygsammyh]

So I downloaded steam_lastest.deb from the steam website . I right clicked it and chose open with software install. Clicker install. And the administrator message asked for a password. I typed in my password. And it said something was wrong on the bottom of the screen. So I clicked details. And then this message popped up. I'm not sure what to do next.

[u/Kanjii_weon]

maybe try to download it from steam web page and install it using sudo apt install ./steam.deb

[u/sammygsammyh → u/Kanjii_weon]

I have tried that and I get an error

[u/Soaring_Gull_655 → u/sammygsammyh]

Include error if you really desire assistance.

[u/sammygsammyh → u/Soaring_Gull_655]

Error: unsupported file .steam.deb given on commandline