Just a train, lvl 3+ [over, solution added]

Hello there, steamgifters!

I present to your attention a train with some hidden cars and another hidden train. Do I have to have a reason for that? Ok, let's say it's to celebrate 300 games sent yep, well aware I'm past that. I wonder how many of those were sent for the past year? But I digress. Here's how it works.

• All cars are 3+.
• The open train starts here and consists of 6 cars.
• There are 5 cars hidden.
• When you find all 5 hidden cars, you'll be able to enter the hidden train, which consists of 5 cars.
• Finding the fifth hidden car also provides the access to the extra train (see the update below).
• There are some random keys along the way.

That's pretty much it. If you want to know what you're looking for, 5 hidden cars are:

1. Showtime!
2. Between Me and The Night
3. The Tribe
4. Knights of Pen and Paper +1 Edition
5. Unmechanical

...and games in the hidden train are:

1. The Bridge
2. Teslagrad
3. Dungetris
4. BADLAND: Game of the Year Edition
5. Legend of Grimrock

The end time for all the hidden giveways is the same as for the open ones.

If there is too much difficulties with finding any hidden cars, I'll drop a hint a couple of days before the end time.

I hope there won't be any technical difficulties, but if there are, and you're certain you did everything right, please add me on steam and tell me what it is.

And of course, don't leave any hints in the comments.

If you're blacklisted which is extremely unlikely add me on steam and I'll explain you why, don't talk about it here.

I appreciate any bumping.

Good luck!

Update 19.11.2016: Ok, fifth hidden car is a pretty hard to find. But it doesn't mean it's not there! Keep looking for it! To instigate your interest in finding it and not just bruteforcing the fifth symbol, I added an Extra train which consists of:

1. Rescue Team 5
2. Optika
3. Pixel Puzzles 2: Birds
4. RPG Tycoon + Soundtrack
5. 10,000,000

You'll find the entrance into the Extra train in the fifth hidden car's description. So if you've already found it, check that fifth hidden car again. If you haven't found it yet, go and find it today! And there are some random keys there too.

Also, if you find any mistakes in the OP, it's not a code, it's just me being supid.

Update 24.11.2016: The hint is in the comments.

Update 27.11.2016 Solution added

View attached image.