Soul Sacrifice
http://andriasang.com/con0yw/soul_sacrifice_presentation/
The concept is "True Fantasy." The "True" part comes from the idea of making sacrifices and payments. If you want to get a lot of power, you have to pay or sacrifice something.
The game does not have the notion of "MP" (magic points). Instead, you sacrifice things for magic. Make a big sacrifice, and you'll get greater power. For Excalibur, you sacrifice your life. If you continually use powerful magic, though, you'll gradually begin to lose your human form.
When you defeat an enemy, you can chose to either sacrifice the enemy or revive/help it. You'll get different things depending on your choice.
Up to four players can play simultaneously. The video showed one player near death following an attack from a cerberus. The player was able to sacrifice his life for the other players, and turned himself into "Salamander," a massive flame which struck the enemy.
http://blog.us.playstation.com/2012/08/24/hard-choices-inafune-talks-soul-sacrifice/
If my character is dying, and my friend decides to sacrifice me, I might say “hey, what are you doing?! Don’t sacrifice me!”
You’re forced to make choices in this game. Of course you could go through the game making smaller sacrifices – anything you find in nature you can use as offerings, rocks or a rat you find in a field – and you’ll get a smaller amount of power. The more you sacrifice, the more power you’ll gain.
The way you choose to fight will affect your appearance. If you keep on saving, or keep on sacrificing, the visual effect will look different; more angelic if you keep saving, more evil if you keep sacrificing.
If you go towards one extreme or the other, the time will come when it may be difficult to keep on going [in your chosen path]. If it’s easier to sacrifice a particular enemy, you might face a difficult decision if you you want to save him. But you can choose to stick with an extreme approach, and you’ll earn more power if you choose the hard way.
Multiplayer mode is definitely a big part of Soul Sacrifice. You have to be strategic in terms of creating your party and choosing your sorcery. One player might want to be aggressive and fight on the front line, while another might want to save more and heal more. Another player might stop time in order to help the others.
You begin Soul Sacrifice as a weak, hopeless human locked up in a mysterious cell waiting to be sacrificed. I wanted to create a dark fantasy world, but it’s not about just creating a story. If your character is placed in a hopeless situation, and you look through his eyes, anything would seem dark and depressing. “Dark fantasy” is a result of the situation you’re in.
The game looks interesting, though I don't see how the 'True' part applies. Bit of an oxy-moron too.
Read about how the player can sacrifice their own spine (by ripping it out and using it as a sword). Lol.
Anyway, game's only coming out on the Vita.