Warframe

In-depth Text Guide:
https://steamcommunity.com/sharedfiles/filedetails/?id=2876554240

This can easily be achieved AFK if you can clip yourself out of bounds in open world. (Still works as of v28.1.0 Steel Path Update. Jul 10, 2020)

Tldr;

1. Head to the edge of the map on Orb Vallis
2. Drive at full speed on the side of a cliff and smash into the outer wall
3. Ragdoll into oblivion and then equip your K-Drive as you are falling
4. Afk for 1.5 hours and the achievement should pop

Head to Orb Vallis and make your way to the edge of the map. Solo is recommended, but can also be achieved in MP. Just be aware that if your party decides to exit you will also teleport to Fortuna. I found the best success on the East edge of the map (the side directly opposite the Fortuna exit.) To clip outside the bounds you'll need to move at full speed on your K-Drive and smash directly into the outer wall. There's a section on the ground just a little beyond the invisible wall that your ragdoll has to reach to clip through. You can distinguish it because it has a lower res texture. It helps to attempt this on top of a cliff so you can use gravity to ragdoll a little further. Once you're out wait a couple seconds and try to spawn your K-Drive again. You'll know you're on it if you can right click or press space and start accumulating points. Congrats, you can now afk for 1.5ish hours. Progress is saved immediately. Note, sometimes you are able to clip through the ground elsewhere on the map, but usually it respawns you at Fortuna if this happens.

This has to be done on foot.

Bullet jumping and/or movement abilities are okay. Use Volt, Zephyr or Nova.

This has to be done in one session without leaving Fortuna. Best done solo or in an organized party. The timer starts when you finish the first bounty, and you can't use bounties you've already completed before.

Before you start, find one of the yellow quest markers around Fortuna and find a datamass and defend the area to unlock an NPC which opens up 3 more bounties. Then go to the NPC by Fortuna and start with the level 3 bounty. Then complete the level 2 and level 1 bounties. Then go to the new NPC and finish those 3 bounties.

You'll have to finish each objective (3 per bounty) in under 4 minutes on average to unlock the achievement.

Fly to the top of the map in Fortuna with your Archwing above the coolant resevoir. Then switch to your K-Drive midair and fall all the way down onto the coolant.

Soul Punch revives DO NOT count towards this achievement. I learned the hard way. I recommend using an immortal frame (Hildryn w Energy Siphon,) and hopping into Plains of Eidolon with a friend and have them just AFK and die, while you revive.

Vazarin focus tree will give you 8 instant revives per map (4 with frame, 4 with operator,) which can help a lot if you want to work towards this passively. Revives on companions DO NOT count towards the achievement. You can press P during a mission and open the stats page to see how many revives you have.