I don't know, but Firefall was removed from Steam and you couldn't install it. A long time before it was removed, you could download but you couldn't launch.
Today I noticed that it was back in my games list, I could install it and I can run it. What you can't do is login, since it can't access the login servers.
Domain Name: FIREFALLTHEGAME.COM
Registry Domain ID: 2255324626_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.namebright.com
Registrar URL: http://www.DropCatch1363.com
Updated Date: 2018-04-25T19:42:27Z
Creation Date: 2018-04-21T18:57:19Z
Registry Expiry Date: 2019-04-21T18:57:19Z
Registrar: DropCatch.com 1363 LLC
Registrar IANA ID: 3572
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS1.NAMEBRIGHTDNS.COM
Name Server: NS2.NAMEBRIGHTDNS.COM
Does anyone know anything about this?
I guess it's just a company that took a popular domain to make money, but who knows?