Radical Rat by TmEE is an yet unfinished platform game for Sega Master System. Gameplay part is not worked out yet nor the cut scenes. There is only forward scrolling with realtime stage data decompression, and basic multipart sprite you can move around a bit.

http://www.smspower.org/forums/viewtopic.php?t=13669

DataStorm by haroldoop. An advanced/better version is planed, as soon as the author gets time on his hands.

http://www.smspower.org/forums/viewtopic.php?t=13653

Tower of Sokaban by Killer Bean 2 and BG is a small demo of what will hopefully, one day, become a somewhat playable game. The gameplay is, as you could guess from the name, about moving blocks around.

http://www.smspower.org/forums/viewtopic.php?t=13670

You’re Derpy Hooves, mail mare. Spike’s ill, so Twilight Sparkle has asked you to fly her letters to Princess Celestia. But Gilda is harassing you! Fly around and press button two to drop an anvil on her. It’ll make her much more angry, which is probably not all that good of a plan, to be honest. Avoid getting hit by Gilda – she’ll steal one of Twilight Sparkle’s letters. If you lose all three, you have to return to Ponyville.

This is a very basic game with no real ending – it just gets harder and harder until you lose all you lives or it loops around and goes back to the starting difficulty.

http://www.smspower.org/forums/viewtopic.php?t=13665

Lost Raider by vingazole and ichigobankai is an unfinished platform game entered into the SMS Power Coding Competition 2012. Your only goal is to survive and to make a big score!

http://www.smspower.org/forums/viewtopic.php?t=13662

DARC is a Jetpack shooter game by Richard Cornelisse and John Hassink. It has influences and is inspired by several games such as Air fortress), H.E.R.O. and Hero Core. The protagonist can fly and shoot in separate directions. Each of the game-pad keys represent a shooting direction. Your goal is to infiltrate the alien fortress. Destroy the cores to disable force fields and advance through the game. During the game your shooting level will increase. As your level increases you will be able to destroy the blue and red crates found in the levels. During your exploration you can use the [PAUSE] button to show your current location in a map. Only the explored areas are visible.

http://www.smspower.org/forums/viewtopic.php?t=13664

“New Duel” by losinggeneration is a not yet complete platfomer for the the SMS Power 2011 Coding Competition.

http://www.smspower.org/Homebrew/NewDuel-SMS

aypok & playgeneration also entered the SMS Power 2011 Coding Competition. Their entry “Rental Car” is unfortunately not complete so you just need to guide a car from start to end. There is no real goal yet.

http://www.smspower.org/Homebrew/RentalCar-SMS

Wickeycolumbus took part in the SMS Power 2011 Coding Competition as well and released a Snake game. It’s a rather simpel clone so don’t expect any funky extras. In other words it’s very pure and basic. Maybe the one or other still wants to give it a go.

http://www.smspower.org/Homebrew/Snake-SG

French developer vingazole released VG-Fighter during the SMS Power 2011 Coding Competition. It’s a simple space shooter.

http://www.smspower.org/Homebrew/VGFighter-SMS