Commander Keen 2.5D: The Quest for Spot's Collar
Commander Keen 2.5D: The Quest for Spot's Collar is an incomplete GZDoom mod by VikingBoyBilly, with an alpha test released in May 30, 2009. The gameplay is modified to more closely resemble the Keen games, such as by adding the pogo and making the player die in one hit. There are two playable characters to choose from: Commander Keen and Marta, the latter of whom uses Moon Shoes instead of a pogo.
In the end of the demo, VikingBoyBilly promised that the full mod would be released when it's done. Since then, however, he abandoned it. On March 15, 2012, VikingBoyBilly shared the graphics publicly for those who'd like to finish the project. 
The year is 1991. After finally killing his arch-nemesis, Mortimer McMire, during an epic clash that would decide that would decide the fate of the Universe, nine-year old boy genius Billy Blaze, AKA Commander Keen, continues to work diligently in his lab. Commander Keen has gone on many more interstellar adventures since he saved the Universe. Some of which are more believable than others.
One day Billy was playing fetch with his pet yorp Spot. He accidently threw the stick into the thick bushes in his neighbor's yard. "Wait here while I go get it boy" Billy said to spot just before he went to retrieve it. But before Billy could dive into the bushes, he felt something heavy land on top of him and he hit the ground. "Tag, you're it!" It was Marta, the annoying girl who just moved into this house with her family a few weeks ago. Marta is new in the neighbor hood and they've been having playdates because their moms thought it would be a good idea. But Marta doesn't quite get that Billy doesn't enjoy her company. Or perhaps she understands perfectly and gets entertainment from annoying him. Marta has an IQ of 313 and a laboratory of her own, and Billy secretly resents the fact that someone else is around who can rival his intelligence. But she is by far better to have around than Mortimer McMire.
"Is this what you're looking for?" Marta grabs the stick before Billy can grasp it. "I don't get what the big deal is." So she threw it on the roof. Billy was steaming mad and chased after her, but she kept running a step ahead of Billy because he was 'it' and she wanted to prove how long she could go without being tagged back. She climbed into a tree, but Billy used his pogo to land on the branch just above her and tagged her back. "Now can I have my stick back?" "Okay, but I don't see how it's better than any other old twig." Marta strapped on her super moon shoes that she found while exploring the moon's craters and jumped on the roof. She threw the stick down to Billy and he ran back to his own yard with it.
"Spot! Here boy!" But spot wasn't there. Billy found a slip in spot's doghouse printed in Standard Galactic Alphabet: "Due to an illegal lack of owner identification, the Galactic Animal Control Association has impounded the yorp found on this planet. If the owner wishes to claim official custody of this animal, please come to the Galactic Pound Station with a collar and tag identifying ownership of this creature before he is put to sleep." Billy screamed in a fit of rage: "But Spot had his collar on!" At that moment Billy noticed the alien ion tracker was blinking. Billy flipped on the display and it showed him a flying saucer that hovered above spot for a brief moment, beamed the collar off his eye-stalk, and flew away with it. Then a second, completely different spacecraft came, beamed Spot aboard, and left a note under the doghouse. "All this happened while chasing after Marta!?"
Billy could just walk down to the local pet shop and buy a new collar, but he was short $1.39 and he didn't want to explain to his mom that his dog is an alien and other aliens stole his collar. So Billy decided to chase after the aliens that took Spot's collar and bring it back to the Galactic Pound Station. The ion trail left by the aliens that came recently led to planet Gloogulus Prime in the Gloog system. Billy hopped on board the Bean-with-Bacon-Megarocket, put it on auto-pilot, and sat back to play a few million rounds of paddle wars because the Gloog system was in another galaxy and it was going to be a long ride. But just as he was a hundred thousand lightyears from Sol he heard a noise in the back engine room. He opened the door to find Marta cramped in the back space. "I saw what happened to your dog while we were playing tag. I always wanted to see the Gloog system, so I thought I'd tag along" Billy was furious, but turning back now would set his trip back too far, so he had to deal with it.
After a very long and annoying ride for Billy which didn't end with him breaking his all-time high-score on paddle-war like he hoped, the Bean-With-Bacon-Megarocket finally settled and landed on Gloogulus Prime. When Billy looked over to the end of the nearby bridge, he noticed an exit sign written in Standard Galactic Alphabet. But this is not the Milky Way Galaxy. How could whoever lives here possibly know SGA? And why would they want to steal Spot's collar? Billy and Marta step out of the Bean-With-Bacon-Megarocket to search for clues behind this mystery...
- Tools used: DoomBuilder II, SLumpEd, Photoshop, MSPaint, FLStudio, GoldWave