I replayed this map today. It is very difficult. The second ''Side effects'' is too. So maybe you can go to the third one right now and come back later. The order is not very impostant. Of course, ''Prologue'' is the first one in the story.

I did it. Thanks to you.

There is an "Add to collection" button under the image. There a step-by-step instructions after that. Use your favourite search engine to learn more :)

It's a good idea but how i do it?

How about making a collection with these maps and putting them in the intended order? ;)

In fact, Joey 0 may be first but if you want to follow the serie Joey 2 is next. In this case, Joey 0 would be after 8. The prologue ''0'', epilogue and Joey's wife were done after 8. It's not very important you can jump at any map. Me. i think the final chapter is a very good challenge. Good luck and thanks to play them. If you complete this serie and i really think it's a good one, please tell me. It's difficult at first but after that rather less challenging. I repeat this kind of pill doesn't exist yet so...lol. Have fun.

Difficult is good, we like challenging puzzles. However I felt frustrated navigating in the map sometimes. Perhaps I was tired, just look how long it took me to ask for a hint. Thanks for that, I was missing the third part of that riddle.
Joey 0 is next, right?

I know it's difficult. I probably have to know how tu use Hammer. It's a future project. lol. It's hard to give you a hint about the last laser but think about angle, portal and a bridge. I can't say more.

I would like a hint on hitting the final laser.

You should consider polishing this map in Hammer, at its current stage it is frustrating trying to figure out which button activates what. I have not solved it yet (that laser cube above the funnel is brutal) but the puzzles are interesting.

I know it's seem hard first but you'll see the light. I understand the frustration with the turrets. They represent the germs (in the story) so... First, kill the two near the door (above). After that, a peace of cake for a while. But the real difficulty will be with the high turrets ''think how to kill them''. Don't forget this kind of pill doesn't exist yet. IoI. I completed and liked your ''test1'' and will try the others. Good luck.

You just transfer the ball on the other side of the laser field.

Had a long go and searched everywhere. but can't find any button to activate the laser?

You'll understand that's not a simple one (medium-hard). A lot of paths, traps and danger. Getting rid of al the germs will be difficult. Good luck.