Developer: SCEJ
Publisher: SCE
Genre: Misc
Sub-Genre: Puzzle
Release Date: Q2 2008
Additonal Info: Also available on PSP
Developer: SCE Studios Japan
Publisher: Sony Computer Entertainment
Genre: Misc
Sub-Genre: Puzzle
Release Date: May 2008
Additonal Info: Also available on PSN
Developer: Zoe Mode
Publisher: SEGA
Genre: Misc
Sub-Genre: Puzzle
Release Date: May 29th, 2007
Additonal Info:
We're fans of puzzle games, especially when they're reasonably priced. Luckily for us, echochrome will cost a mere $10 USD on both the PSN and PSP in the US.
We wholeheartedly recommend you pick up both versions. Why? First of all, the game's M.C. Escher inspired puzzles delighted us when we previewed the game last month. However, that may not be a good enough reason to play the same game on both platforms. This is: not only will the PSP version have completely different stages than the PSN version, but it will also feature a level editor. Your favorite creations are then able to be shared with friends via Ad Hoc.
While the PSN version of Echochrome won't support remote play, you can get the full echochrome experience across both platforms for a pittance when the titles are released in early May. Prepare to fall up.
Source

Echochrome Enviroment System Trailer
Echochrome E3 '07 Gameplay
I'll be buying this for sure!
I'll have both versions on day 1. I've been looking forward to this game for a long time now. I'd still rather have it in disc form though.
im pretty sure i read that the psp version has 100 levels and the psn version has the level editor. it would be to hard to have a level editor on the psp version.
I will be getting this day one for the PSN. Cant wait!
i can't buy anything from the store until the network cards come out
I was prepared to pay whatever price they tossed at me for this game, so $10 will be perfectly fine!
Had some problems with this game lolol
found it hard to place the platforms when he fell or jumped !!!!
10 DOLLARS!!! HECK YA!!!! I'm so buying both... no questions asked!
PSN: DarkJ3JB
Ten bucks won't kill me, plus I need more PSP games
this game looks really good, looking forward to buying it