Darksiders Warmastered Edition

If you plan on playing through the game I recommend waiting until later to try complete this as there is an area with enemies that are easy kills.

After you have beaten Stygian, the 3rd boss after meeting Samael, you will gain access to the Iron Canopy area. This area is filled with spiders, but most importantly are the little spiders that tend to hang out on the walls. Note that if you are in need of health that these little guys, if you press around them, will give you a small amount of health and with the amount of them around in certain rooms it adds up.

For the purpose of this achievement there are multiple areas where you can run towards the walls they are on and get them to follow you (they are usually in groups of 3 or 4). as long as you keep moving they don't really attack you and you can get a big group of them around you and unleash your Blade Geyser to unlock this achievement with ease. At this point in the game I had unlocked Blade Geyser lv. 2. If you are still at lv. 1 it may prove a little more difficult, but is still probably possible, as the room I got it in had about 15 spiders and my attack only didn't kill 3 of them. This, to me, was the first easy point to gain this achievement, as the zombies are the only other likely enemies to do this on earlier, but they are pretty quick and can sneak some attacks in on you making it more difficult.

I hope this helps. Please let me know if you find any issues with this guide. Happy demon slaying

I got this achievement in the Broken Stair. As you're running up the stairs in the ruined house (above and behind Vulgrim's location) on your way to the broken freeway, several weaker enemies will run down the stairs. Gather them around you and then use your Blade Geyser attack.

Another way you can unlock this achievement easily and pretty early on in the game is during the level The Choking Grounds. You'll want to head to the Tormented Gate located on Northwestern corner of the map where you will interact with the gate by using your Earthcaller, triggering a cutscene where you will be told about the Dark Realm (All part of regular story progression). After the cutscene you will find four portals scattered throughout the level and map, each of which will transport you to a different Shadow Arena Challenge. There are two of these challenges where you can easily knock out this achievement, either Speed Brawl where you need to defeat 40 enemies within the time limit or Venomous where you need to defeat 50 enemies before War's health fully depletes. I unlocked it on the Venomous challenge. When the challenge starts you'll see that a number of enemies spawn in front of you, not behind. At the start only small enemies that are easy kills spawn. Don't kill any of them right away, instead just run away from them and post up by the wall behind you for a few seconds. You'll notice that they group together as they come towards you. When you feel that at least 10 are close enough together, run or jump in the middle of the group and activate your Blade Geyser. On my first try I took out 17 with one attack so you should have no problem getting 10. My Blade Geyser was only at Level 1 so you don't need to worry if it isn't higher. If you don't get the 10 kills your first try, just quit and retry, your game will be auto saved right before you use the portal.