We played the Murder on the Orient Express quest. You'll hardly find a quest room like this in Yerevan. Very interesting puzzles, very beautiful design, and overall complete satisfaction at the end of the game.
We were on the Orient Express quest. Cool. Atmospheric, interesting, technologically advanced. We had fun.
The quest can be completed in Armenian or English. It is better to take Armenian-speaking and Armenian-reading friends with you. Although, you can just do with English.
I would also like to mention the nice staff.
I recommend it! You won't regret it!