In A Valley Without Wind 2, there are Stratospheric Citadels that, supposedly, you can't complete unless you have Triple Jump. (The Evil Overlord's keep also can't be completed without it, though it can be entered and you can improved mage classes there.)
In my current game, I have Double Jump, plus access to several perks that will enhance my jump height. Can I break the sequence, skip getting Triple Jump, and go for the end-game now, by clearing both of the Citadels and the Evil Overlord's Keep? I've already located both Stratospheric Citadels, but I can't spot any other Research Facilities at the moment, so finding Triple Jump will be a bit tricky for me.
(I've tried entering one of the Citadels. There's a cliff at the beginning that claims to require Triple Jump, but I can clear it with a well-enhanced single jump. Unfortunately, I don't see anything that looks like a Citadel, stratospheric or not. Does the entrance not appear until I have Triple Jump, or am I just not spotting it?)