A solid showing, though with a slightly different flavor. While in the previous chapters many puzzles were self contained, this time there's a much more requirement to carry knowledge from one part of the map to the other. Thankfully there's a screenshot feature built in, but unfortunately it does not save them if the app quits. Puzzles are solid and logical with one significant exception involving an extra layer of reordering of symbols.

Just finished playing XON 4 and have to say it was one of the best games I've ever played. I was skeptical at first considering the reviews that said the puzzles were so complicated that I would have to use walk-throughs to finish. I mean, what's the point in that? I was able to finish the game over a couple of weeks all on my own. I think the only requirement for doing so is patience and fully immersing oneself in the game environment. Everything you need to complete the game is readily available. I tend to approach these "Myst"-like games by imagining that I am truly there and have no outside help. Isn't that the whole point? If you want a game that really tests your ability to think things through, XON 4 is awesome. I like the fact that sometimes I would have to sleep on it and wake up in the morning with some new ideas about how to approach the next chapter. I like the way it became an alternate world that I was temporarily living in for a couple of weeks. I like the way it stretched my brain out and challenged me. I highly recommend this game for those who are ready to take on the challenge of turning a mysterious world into something you know like the back of your hand. BTW, I've never written a review for a game before...I just felt compelled to share my experience and thank the developers for a fascinating experience.

I did this after finishing myst and riven, and it is as wonderful as they are. The main difference is that myst has a sort of storyline (more like a soap opera) running through the whole thing, whereas this leaves it to your imagination to figure out who you and why you're there. Also, and you may or may not like this, there are no handwritten journals to read in the con series. (I have a limited tolerance for having to remember who did what to whom and who needs what in order to gain world domination -- there's a reason I prefer game playing to socializing with humans) this game had a quirky little not in each chapter, except 4 - or else I never found that one. But otherwise you just figure it all out as you potter around. I adore the ambience and the lack of pressure. Once you solve a puzzle it says solved, switches stay switched. No need to race around in time limits. I really really wish you'd make more chapters. Oh and what the heck is that final sound effect? I made it replay the last scene again just to experience those last few seconds. Hilarious. Kudos to the creator. Best entertainment ever.

I loved the entire series. The only other game series that comes close are “The Room” and “The Eyes of Ara”. The only problems are that XON has set such a high bar that all other games are boring and lacking and that it is finished. The length of the game is great, the controls are fantastic as well as the graphics. Figuring out what to do is the perfect combination of hard and doable. Please, please come out with another episode.