Steam-Birthday today, let's celebrate! (Train inside) =)[Almost ended, only Whitelist-GAs remaining]

Hey everyone, in some hours, I will receive the 11 years of service badge and I think this calls for a celebration. =)

So I prepared 2*11 GAs + some keys for you.

20 stations (Lvl 2-5) are covered by this train and the keys are scattered over them.
EDIT: It seems that all 5 keys are taken, so only the 20 GAs here to win. =)

The last two GAs will be for my Whitelist and join the party later (can create only 20 GAs at the moment).

I have some space left on my WL, so tell me some good jokes, post some awesome pics/gifs,... I don't know, surprise me. =)

Let's start!

Here some additional info about the keys: They are each splitted in 3 pieces 'XXXXX-', '-XXXXX-' and '-XXXXX'
and there will be a hint telling you the pieces who belongs together and the game you can unlock with it.