SMITE

I was working on this with a group, and we were able to get it in a 3v3 Joust because we discovered that Sun Wukong's decoy counts as a God! At least for this achievement. So Horus got his two teammates, including Wukong, to bunch up with him, Wukong popped his decoy and aimed it at a nearby wall so it would not run off, then landed out of his ult. Then Horus quickly ulted and brought his two teammates and Wukong's decoy with him. Achievement unlocked!

As Horus, have three allied gods go with you during your ultimate.

Horus' ultimate is called To The Skies!. You send a mirror image of yourself into the sky, and leave a physical version of yourself on the ground (that can still be attacked and killed). You control the mirror image and can scout for a location to fly to. Once you select a ground location to land on, you will channel for two seconds. Any ally near Horus after these 2 seconds (inside the circle that appears around your physical body) are flown to the location Horus’ image chose. You have to pick up three allied gods and bring them with you to whatever location you choose. Probably best attempted in Arena, try calling on your allies to group up in your base before using your ult and transporting them into battle.

You can also use this in a troll-y fashion and wade into a team fight (later in the game, as you'll have some protections built up by then and can tank more damage). Use your ult and as soon as you're in the air, target an area on the ground. You'll channel and then take anyone with you, which will be three people if you're lucky. However, the best way is definitely to try and co-ordinate with you team, group up and then tactically use your ult. Grabbing and landing with three allies will pop the achievement.