Halo Anniversary – Grenadier Achievement Guide

The trickiest achievements in Halo: Combat Evolved Anniversary requires more than patience, they require skill. Not even a Halo veteran will have an easy time getting all the achievements in this graphically enhanced HD version of the original Halo on X-box, that’s why Game Front has scoured the collective minds of gamers everywhere to put together a short guide that’ll walk you through this nasty achievement. Follow our steps to make this achievement possible, it might not be easy, and it will take practive, but our tips will put you on the right path.

For more extra information on Halo: Combat Evolved Anniversary, check out our walkthrough and cheats page.

Grenadier Achievement Guide

  • Grenadier: 20G – Escape the map room on “Silent Cartographer” without firing a single shot on Heroic or Legendary.
    1. Don’t fire a shot, and play on Heroic instead of Legendary. There’s no reason to make this more difficult than it already it.
    2. Entering the tunnels leading underground, try driving your Warthog deep into the tunnels — you should stop fairly early in, in a walkway. Leave the Warthog behind, it’ll be useful later.
    3. Before entering the map room, make sure you’re stocked up on grenades. Fill up on frag grenades and plasma grenades, you might have to scrounge outside first, and save your grenades while fighting to the map room.
    4. You’ll find a cache of frag grenades near where you fight Hunters. For plasma grenades, fight the Elites to stock up.
    5. Before activating the map, kill everything in and around the room. Use your guns all you want, you only need to rely on grenades and melee attacks once the map is activated and the ambush begins.
    6. Activate the map, and make your way back out. Running up to the upper floor, you’ll be attacked by two jackals on the ramp. A frag grenade should take care of them, remember to be very careful with your limited weapons.
    7. Leaving the ramp chamber, look for a door right that leads down. Find a camo power-up, you’ll turn invisible, making it easy to sneak through the next floor. Just run with the camo equipped, don’t bump into any enemies or you’ll attract attention.
    8. Back upstairs, you’ll return to the same room you fought a Hunter. Inside, there are now Grunts and Elites. Tons of them. Stick to the outer edge of the room and you can totally avoid the group, you’ll only have to deal with a single Elite guarding the exit.
    9. Stick the Elite with a grenade, melee them if they aren’t totally down, then run upstairs. The Elites and Grunts shouldn’t follow you up.
    10. Into the next room, you’ll have to deal with a large number of Grunts, Jackals, and an Elite. Your main target is the Elite, it’ll follow you if you try to run upstairs. Duck and hide someplace safe, you don’t need to kill every enemy, but make sure if you do run away, that you finish off the Elite before continuing forward.
    11. Soon you’ll close-in on your Warthog, the same one you left behind, wedged in a doorway down the straight hallway. Before jumping back into the Warhog, you’ll have to deal with a Gold Elite Zealot. He’ll roar when he sees you, giving you time to peg him with a Plasma Grenade. Rush in close and finish him off with a melee strike.
    12. With your Warthog, drive and back out to the exit. The hallway is now full of invisible Elites. In your Warthog, they’ll have a hard time hitting you, so long as you move fast. Drive out of the hallway, over the landing pad structure and dive out onto the beach.
    13. Now that you’re a safe distance away from the structure, those Elites should leave you alone as you wait for the Foehammer to arrive and fly you to safety.
    14. Enjoy your achievement! It’s one of the toughest.

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    6 Comments on Halo Anniversary – Grenadier Achievement Guide


    On November 18, 2011 at 5:53 am

    There’s actually a much easier way. Play through on Co-op either by yourself or with a willing friend. Once you activate the Cartographer, switch to the other controller and beat it that way. You’ll be able to use guns all you want, with the added bonus of having a spawn point. At the completion of the level the gamertag attached to the controller that was inactive will get the achievement. Nice and easy.


    On November 19, 2011 at 11:04 am

    Chris’ tactic can also be used for the achievements where you don’t pick up a health pack or shields. I combined these with the co-op achievements on legendary, and got 6 achievements in one run!!!!!


    On November 19, 2011 at 8:08 pm

    I actually found this achievement to make legendary insanely easy. A few things that helped are:

    1) Save the overshield by the map until you’re ready to activate the map.
    2) The elite in the room where you killed the hunters doesn’t follow you up the stairs (or at least he didn’t follow me on the two attempts it took to do this).
    3) Double stick the elite zealot or else he won’t die (which is why it took two attempts for me).

    The overshield is how I survived to get to the cloaking and so long as you don’t stop running it is easy to make it through most of the level with stealth (it runs out just before the door to leave the room where the hunters were). Also pretty much every elite that you need to stick is an easy target if you properly run through the level as you will come up on them and have a chance to stick them before they even react to you (so easy stationary target to stick).

    Caylen H-S

    On November 20, 2011 at 6:27 am

    Can’t you just use the bandana shkull for unlimited ammo?


    On December 25, 2011 at 1:30 pm

    Actually the easiest way is just to activate Boom and Bandana… Unlimited high-explosive grenades


    On December 29, 2011 at 12:36 pm

    Bandana. nuff said.