Is this really the ending (read only if finished)

[Slith]

yeeeaaeah, did you not actually try and escape?
I like the fact that they did actually give you a time limit in there, but that is defenitly not the ending.

Did you just wait in your cell for 15 minutes?! Lol, you're supposed to break the side wall to get out.

If you're talking about the final room...

Spoiler below!

When Alexander is hovering or something over the blue flames, then there are three possibilities: Either wait and let him enter the portal (Bad ending), Wait until the portal opens and toss Agrippas head into it (Good ending) or push over the pillars to ruin the ritual and as a result kill Alexander (Revenge ending).