Yes, but it gets limited a little bit, that you can probably only connect from website server list.
Version 1:
- See older tutorial:
https://youtu.be/fEMRvGOO5dc?t=2m24s
- Go
http://crymp.net/master.php
- click JOIN on any server suitable your Crysis version
- console application launches and asks you to select Crysis.exe
- go to your Crysis folder (most likely C:\Program Files(x86)\Electronic Arts\Crytek\Crysis\Bin64
- select Crysis.exe or Crysis64.exe
- wait until you get connected
Version 2:
- on your desktop is Crysis-Multiplayer shortcut or something like that
- click it Right and go to Properties
- in Target path, change
Bin32 to
Bin64 , so it looks like ........\Bin64\Crysis.exe -mod sfwcl
- click Apply and OK
- run game through this shortcut
- open console
- write "0" (without quotes) to get server-list
- type number of any server to connect
Please let me know whether any of these works, I don't have 64bit OS, so I could never test, it's only theoretical.