Exoprimal

Main Goal

The main goal here is pretty obvious, you need to kill 100,000 dinosaurs of any type.

This will most likely be your last achievement in this game.

Tracking

While this isn’t tracked within the game (as far as I can see), your own personal Xbox stats do track them and they update at the end of every match.
To find them, press , scroll along to the achievement section and hit the button called “stats”.

After around 14 hours of play, I’m at nearly 11,000 Dino kills, so assume this will take between 80 and 120 hours of prime dinosaur killing to unlock.
This is entirely depending on your chosen class and your skill with the game.

Dino kills only count if you complete a game.
If you quit early or disconnect during a game, you will not be credited with the kills from that match.

Priority

When it comes to kills, I recommend not caring when you start the game. Focus on getting 1000 kills with each of the Assault class exo-suits; Deadeye, Zephyr, Barrage and Vigilant, as these all have associated achievements. You’ll also want to get all the other suit achievements, as you passively kill dinos.
With that done, focus on getting 10 suits to level 10 and then the 50 modules.

When that’s done, then you can focus on this achievement.

Killing Tips

So far I’ve found no easy ways to do this.
As you progress through the game, you’ll finish in a handful of boss mission, which throw essentially endless numbers of dinos at you. These are good spots for grinding with whatever suit you’re most adept with.

It does seem as though you have to be the one who gets killing blow. I found I was averaging 200 kills per regular match as a low damage support character like Witchdoctor, whereas my best character Murasame, was averaging 500 kills.
I personally found all the Assault class exosuits a little underwhelming and too easy to be killed, but that’s just my preference.

Another excellent choice is Barrage using his level 5 Skip Chip for extra ammo, splash damage and reload level 5. Thanks to Noth for this suggestion.

At the expense of your team, when the target dinos you’re meant to be taking aren’t raptors, but raptors keep spawning, keep focusing them rather than the target dino. While you might end up losing the match, you’ll kill more.

I also found that when selecting a game, choose the PvE option. You get less XP at the end, but you do seem to get to face more dinos in the final challenge than if you were doing PvP.

Future Content

As of release, the solution here has the best tips.
That said, more content will be added to the game over time, including the Savage Gauntlet PvE game mode, released on 28th July 2023. This mode will likely make the grind a little easier, as well as future updates.

If anyone else find any extra info or tips, let me know in the comments below and I’ll add them here (especially if you downvote this)

The previous guide is very good and above all provides excellent information, so I will only give some tips for people who want to get this achievement as quickly as possible. It should be clarified that this guide is written with the modes/exosuits available at this time (1.0.1) and any comments or corrections feel free to do so.

After testing all the exosuits I found that the most effective are Barrage and Murasame, this second one has a high life and an easy accumulation of dinosaurs, but I found that Barrage is more effective because all his abilities do area damage and besides that he has the burn effect where we can cover much more enemies. The configuration I used with this one was:

• Exosuit: Barrage.
• Rig: Cannon (doesn't matter so much).
• Modules: B01 - Blast Enhancer, B - Lingering Threat and B - Flare Dodge (to level 5 as soon as possible for the three modules).
• Wargame: Dino Survival.
• Cross-Platform Play: Off.
• Mode: PvE.

First, focus on the large groups of small/medium dinosaurs, then on flying dinosaurs, and finally on large dinosaurs. On targets that you have to defend or are in a specific area, don't be afraid to go out of the area to take advantage of eliminating dinosaurs.
With all this setup I finished in about 12 minutes, which gave me a total of 700 - 900 dinosaurs per game; although this depends a lot on randomness, equipment and game type.

Everything written above is based on my experience after almost 80 hours of gameplay (something I would have liked to know from the beginning because it would have certainly saved me several hours).
I hope it is helpful and an apology for the spelling mistakes; English is not my native language. Happy hunting.

The above guides have great tips and builds to assist with this achievement. Simply adding that now as of today's update, you can create your own private matches for this. Choosing matches such as the vtol protect missions or pterodactyl swarm missions, I was able to get 1000 kills after 2 matches doin this. Unfortunately you can not play solo but getting in a match with one other booster will help rack up your kills tremendously.