Hello everyone!
If I play through Tier 1 of a particular gate, there will be no cost to start at Tier 2 the next times. I have to do this for every gate. After some time the gate will fade out and new ones will open. So if I don't plan to play this gate several times in the next days, is it sensible to unlock it at all? How long will it take until it returns (gates names are combined, right?). Will it return? Will it stay unlocked, if so?