Samuel Otero is the creator of the Android/Flash game Pokémon Tower Defense released in March 2011. Due to a recent interview with Sam, He stated how he came up with the idea for Pokémon Tower Defense, saying:
"I really like Pokemon and always wanted to make a Pokemon game but was discouraged from finishing them due to various reasons. When I got into the Android Marketplace I noticed a lot of apps that used Nintendo Characters or other characters so I thought why not. The game started originally as a virtual pet simulator. I started planning it out on paper and I realized it was going to be a lot of work for just a pet sim, and at the time I looked at what the most popular paid game was. It was a "tower defense" game so I immediately thought about capturing your enemy and leveling up your towers like Pokémon"
Sam is 27 and works as a programmer at home. His email is firstname.lastname@example.org and other than a picture of Sam, this is the only information known about Sam right now.
On a side note, he has been confirmed to have a 3DS, since a Twitter post back in October saying that he got Pokémon Y.
From time to time, he makes livestreams showing him sitting at his desk programming things into Pokémon Tower Defense: Generations. The livestreams can be located here, that is, if he's actually doing one right now, you can see if he is on his blog.
For his birthday on November 26, Sam always does a legendary Mystery Gift to celebrate it. For his birthday in 2011, he made the Mystery Gift in PTD 1 Victini, for his birthday in 2012, he made the Mystery Gift in PTD 2 Jirachi, and for his birthday in 2013, he made the Mystery Gift in PTD 2 Kyurem. For his birthday in 2014, he made the Mystery Gift Primal Groudon and Primal Kyogre. This came with the 1.77 update for PTD2, and a Shiny Lunatone gift was released as well.
A Samuel Otero overworld sprite created by the twitter user Mario18010 is used in PTD 1 and 2 to represent Sam in-game. Sam first appears in PTD 1 and 2 in the Rocket Hideout level in PTD 1 when you battle his Shiny Pokémon. Click here to see his game character.
Sam has said there will be NO MORE MYSTERY GIFTS for Pokémon Tower Defense 1.