Halo: Combat Evolved Anniversary

Halo: Combat Evolved Anniversary Achievements


Kill 100 Flood Infection Forms on the level “Keyes” on Heroic difficulty or above.   

Just shoot the little poppers when you see them. One pop will kill a few of them each time. They also rupture when they hit your shield. so getting 100 should be no problem by the end of the level.

The easiest way to get this is while beneath the ship, you will come to a cliff-side where there will be hunters fighting Carrier flood forms. Don't drop down, but instead stay up top and the carriers continue to spawn. With the Bandanna skull, they will continue to spawn and you can just continue to grenade them until you get the achievement.

Rate this achievementAverage Rating (Based on 6 votes)
User Comments
Comment #1 by Fridgey
Friday, October 14, 2011 @ 11:22:33 PM

Comment #2 by Blue Thunder28
Saturday, October 15, 2011 @ 01:21:33 AM


Comment #3 by DRNoob
Saturday, October 15, 2011 @ 07:47:27 AM

This is a gimme. Not only do infection forms take only one shot to kill, not only are there way over 100 of them in this level, but in the second battle after you drop down from the Covenant ship, the second battle has an unlimited amount of them coming out of the cooling liquid, so just camp and shoot uintil you get it. This should come naturally on Heroic!

Comment #4 by Severan
Saturday, November 19, 2011 @ 01:47:22 AM

With respect to #3, why even wait that long? You can camp there by the dropoff into the coolant puddle and chuck grenades down the corridor into an unlimited wave of flood. (Note: Bandana helps.)

Comment #5 by SN1P3R VIPER
Sunday, November 20, 2011 @ 01:23:00 AM

Anyone else wonder why infection forms pop and look like shredded paper floating around? On achieve note you can blind fold your self and still get this one bagged.

Comment #6 by ObligatoryFate
Sunday, November 20, 2011 @ 05:02:40 AM

So, do I rate this a 5 star for a clever name and for its super ease of acquisition, or do I rate it a 1 star because it's so easy and a 'gimme?'

Comment #7 by DuckyStyle
Tuesday, November 22, 2011 @ 05:12:55 PM

yea i wondered too #5, it's like they're full of air like evil balloons running around or something

Comment #8 by Forby
Wednesday, November 23, 2011 @ 12:13:19 PM


Comment #9 by Forby
Wednesday, November 23, 2011 @ 12:15:21 PM

Someone please help? How do you get your gamer profile thing to the left of your comment?

Comment #10 by erveii
Thursday, November 24, 2011 @ 10:31:38 PM

i have killed way too much than a hundred on heroic and didnt get this cheevo, i also killed every elite i tried every corner on the land map, then on the ship i tried every tunnel twice, and killed every fucking elite just to not get this cheevo, maybe if theyre killed by the flood does not count or what ? CRAP...

Comment #11 by Forby
Friday, November 25, 2011 @ 03:02:34 AM

My friend... it's the little crawler guys who you need to kill 100 times, they blow up like popcorn hence the cheevo name. You're thinking of the other cheevo for 50 kills and how do you get ur Gamerscore to show up when you comment?

Comment #12 by Dakam12
Monday, December 19, 2011 @ 06:49:18 AM

Can you get this achievement by killing 100 of them, then saving and quitting.

Comment #13 by n1ck3sixty
Tuesday, December 20, 2011 @ 07:08:18 PM

#12 obviously if the achievement pops it doesnt matter what you do afterwards.. You could turn off your xbox and it would still be there when you came back.

Comment #14 by friedeggs069
Monday, January 02, 2012 @ 09:07:58 AM

Pshh... i got it with the bandanna skull and it took me litterally about 2 mins into the game.... Here is how i did it....
1. Go all the way to where the door is... with the big hole inside the cruiser
2. wait for cortana to finish talking...
3. There should be floods where the grunts where... The flood will never ever run out until you jump!
4. just keep tossing grenades until you get achievement! Have fun! :D

Comment #15 by ACForino
Thursday, January 19, 2012 @ 03:10:22 PM

The easiest way i found to do this is to put on the following skulls:

Boom, Bandana, and Grunt Funeral.

This allows you to have infinite grenades.

No fight through the first few sections to the point where you pass through a narrow mountain path that ends with a drop off into a green pool. In front of you will be two hunters and numerous other covenant forces. Infinite Popcorn Flood Forms will continuously walk out of the green pool SO LONG AS YOU STAY ON THE CLIFF. Do NOT jump down or it will ruin the infinite spawn. Now just continuously throw grenades into the green pool and be always on the lookout for flying popcorn forms (They literally will explode and fly all over the map like popcorn). The effect is really funny and cool looking. Plus you get the achievement in m

Comment #16 by Killa12
Saturday, March 03, 2012 @ 04:51:59 PM

Ya just right before u jump in the goo hole, turn around and just camp rite there. Super easy with bandana on as u just chuk grenades under the hole they come out of.

Comment #17 by Keldog777
Monday, May 21, 2012 @ 12:28:44 AM

When I kill these they look like leaves falling..:

Comment #18 by steb9780
Friday, June 29, 2012 @ 08:17:03 AM

Yep I agree with #14, just got this achievement. Easiest of the heroic difficulty ones I think. Don't drop into the pool, just look back where you came from, have bandana and boom skulls on and just spam the grenades. Be careful though if one of the carrier forms blows towards you, step aside and just shoot the little poppers. Took about 30 seconds for this one to pop...excuse the pun ;-)

Comment #19 by Rivboets
Tuesday, August 07, 2012 @ 08:37:56 PM

Idk why but my favorite enemies are the infection forms.

Comment #20 by Mr Jordy Bear
Tuesday, October 23, 2012 @ 08:47:53 AM

Comment #21 by Micky1991
Thursday, April 24, 2014 @ 09:39:03 PM

Can sumone help me with this please
GT : SLAY3R2014

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Game Info
343 Industries


US November 15, 2011
Europe November 15, 2011

Kinect: Compatible
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User Score is based on 995 user ratings.