Syberia 2

After reading some of the comments on Sashamorning's solution, I decided to try and find a better Syberia 2 guide, and I eventually settled on the following, with which I was able to 1k the game in less than 4 hours:

http://www.gamefaqs.com/xbox/918867-syberia-ii/faqs/29669

It's a PC version guide, but I only found one instance that had information out of order for the Xbox version. That is: When you get to the part that you have to ask the Colonel for the warm clothes (061), instead get the shroud and use it on Hans (complete steps 066-069) first. Then proceed as normal.

Also, since you're surely trying to get all the achievements as well, remember to do the following missable tasks (I'm only listing those not mentioned in the text guide—be sure to do each one as early as possible so as to not miss it):

*In Romansburg's Monastery, speak to the monk next to the elevator.
*In Romansburg's Monastery, use the device by the elevator to create a regular candle.
*In Romansburg's Monastery, pick up the brush (next to the bucket) after the eavesdropping monk runs away.
*In Romansburg's Monastery, speak to the monk digging the grave.
*In Hans' dream, speak to Father Voralberg in the living room.
*In Siberia, go right, interact with the guard, and pick up the Youkai Medallion.

Everything else should be covered in the guide.

Of note, time spent in the Pause menu does not count toward the six hours. I started the game, paused and got dinner, and came back. Still got the achievement.

There is a very good walkthrough posted here: http://www.gameboomers.com/wtcheats/pcSs/syberiaii.htm

Some of the instructions do not exactly match (you may find that you have to do some small things out of order), but for the most part it works well.

Of note, the guide doesn't always point out the missable achievements. I'll put them in that guide too, but here they are as well: