Prototype Achievements

On Instinct

You've completed the Mother Boss Battle.   

Story Related, Cannot Be Missed.

Rate this achievementAverage Rating (Based on 3 votes)
User Comments
Comment #1 by E vee dub
Tuesday, December 21, 2010 @ 02:55:52 AM

This achievement put me over the 150,000G mark.
Went from 149,995, to 150,015G.

This is one of the hardest boss battles I've faced. It took me several hours to fingure out. I had to reload my save each time I died for the "Hard to Kill" achievement.

Put on your armor, pull out your blade, climb the buildings, jump out, target her, and slam down on her by holding the Y button.
Good luck.

Comment #2 by FixedApple
Saturday, January 01, 2011 @ 10:46:07 PM

This b***h was definitely "hard to kill"... :D All I can say is blade and armor.

Comment #3 by camandez
Monday, July 11, 2011 @ 09:59:05 AM

Yeah a bit late, but someone suggested you use that critical face palm thing or what ever it is called, i never tryed it, well becuase i just can't be bothered :P

Comment #4 by ugoman
Monday, September 05, 2011 @ 02:55:21 PM

I actually DIDN'T use the blade and armor tactic. I just used my armor, but I used muscle hands and kept chucking cars at her from a distance. Occasionally I would get close to use a devastator on her, but then I would run back and continue the car throwing. It was very effective, and actually was very easy for me, since I would always be far away when she uses her infection-wall move. When she uses the green ball move, I could easily run into an alley. Took me about 5 minutes to beat her.

Comment #5 by zEn666
Sunday, July 01, 2012 @ 06:13:43 PM

i did it just now ... this damn b*tch :D filling up to critical mass and dropping with a devastator attack should damage a lot. do it 2-3 times and you are able to damage herself. then repeat and it should be done

Comment #6 by TommyD758
Saturday, August 04, 2012 @ 11:49:33 AM

I'm playing on easy and I can't even beat her...

Comment #7 by west57x
Wednesday, November 13, 2013 @ 07:33:55 PM

the "easy" way I did it was running round the corner of a building where she couldn't hit me with anything and just consumed, ran up to her and used devastators (usually twice in a row) then ran away and repeat. actually was an easy fight so long as you play it safe and be patient. that's probably the worse part... being patient

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Game Info


US June 09, 2009
Europe June 12, 2009

ESRB: Mature
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User Score is based on 1584 user ratings.