It doesnt work for PS3, in the menu i see,"Enter Battle Code" and its locked
yes
I have three very good co-op/multiplayer demos (This is my opinion, sorry if you don't like the demos.) for you. The first one is called Crackdown 2 Demo. If you don't have an Xbox 360/Xbox Live you can't get it. It's unfortunately Xbox 360 only. The next one is Crysis 2 Demo, and last is Homefront Demo. I'm not exactly sure if they all are still on the marketplace. I hope this helps!
No, the Dead Space 2 demo is single-player only for ALL consoles.
Not on single player. On Multiplayer you can though.
No, you can only play singleplayer.
There is no demo on the PC
if its a demo no if u pay for the full version yes
Yes. Simply google "halo trial" and you will get several pages to download the demo game from. The demo lets you play on the campaign level Silent Cartographer, and the multiplayer level Blood Gulch.
A demo key is an activation key code that unlocks a program or software that enables it for a demo period or enables only demo capabilities.
You cant its only one player
Yes, I am pretty sure that you can. You need a Minecraft or website account to play the demo I think, if you didn't know that already. Hope this helped! :)
No, you are limited to what's already unlocked in the demo