How do I open this hell gate ?

[senate]

http://steamcommunity.com/sharedfiles/filedetails/?id=686342591

[i green, i idiot]

if its the gate i think it is: just keep playing

[Fine Italian Leather™]

Jesus your brightness settings are awful. Anyway, you need to get the Blue Skull key, once you have it, come back and the gate opens.

[senate]

I listened to the gamma guide where you set it to just barely visibile haha