A look back to Humbler times [Level 2 Train] [ENDED]

I've been saving up some Humble Bundle keys for a while, and I think now's the time to part with them. All keys will be Humble Gift links.

Entry to the train will be guarded by a puzzle. Please don't post spoilers. I'll be happy to provide hints if people are having trouble.

Each giveaway will last 24 hours and start/end at 12:00 PM CST, two giveaways per day. Due to giveaway limits I won't be able to post them all at once, so keep an eye on the latest giveaway for an updated link to the next car of the train.

I've decided on a theme of reflecting on the past. If you feel so inclined, please post one of your favorite memories, or discuss the poll.

Good luck everyone!

Hint #1 - The answer ends with the letter A

Hint #2 - I could easily add these extra lines to the riddle:
Number 26 generates buzz,
But does not indulge in rumors,
12 can live, laugh and love,
Though it has no sense of humor

Hint #3 - Pay attention to where Number 5 begins and ends and where Number 2 starts

Hint #4 - Another set of lines to add to the riddle:
Number three can crack the case,
But cannot solve the issue,
Number twenty ends the hurt,
And also births the tissue

Hint #5 - The answer starts with the letter A

Riddle Answers:
Riddle 1 - The letter A
Riddle 2 - Smoke
Riddle 3 - Waterfall