You can get the foam finger gun in Dead Space 2 by beating the game in hardcore mode. You can get it from an unmodded version of the game on any platform (PS3, Xbox 360, PC)
Here is some proof so people don't remove this thinking I am lying: https://www.Google.com/search?q=Dead+Space+2+Foam+finger
http://kotaku.com/5746431/beat-dead-space-2-and-it-will-give-you-the-finger
http://deadspace.wikia.com/wiki/User_blog:CrackShot/Dead_Space_2_Foam_Finger_Weapon
http://deadspace.wikia.com/wiki/File:Dead_Space_2_Foam_Finger_Gun_Easter_Egg
You can now also get something similar in Dead Space 3, which is called the devil's horns.
Chat with our AI personalities
shoot outsid the screen that should reload your gun.
you have to save the group from Kino der Toten
you drop a gun by pressing F. Actually, you press Space to drop it. Then run into the gun you wish to use.
in the north plaza, when you exit carlitos hideout go straight to the west (left)
emile will talk to her and you and is preety mad so he gets his gun and goes bam she is on the ground dead and he will point his gun at you but you dont die