It is not. It is made with TyranoBuilder.
Viewing post in The Second Circle: A HellTaker Fan Game comments
Bro why did you take down the previous Version's im going crazy how bad i want to play it.i just played your current version 0.40 it was Great as always but i want to get to the beginning of it all can you guys maybe please bring it back for people who just recently played your game.i love your games by the way especially the new Version