Here is my guide to a bunch of miscellaneous achievements early on in Bugsnax.
You need to progress in the game to the scorched gorge area.
- Up on a rock in front of you is a grumpus. Go talk to him.
- He gives you a launch pad, so you can launch the ball gadget you have at the windmills.
- Now, he wants a cheepoth, which should be behind you flying around (if it's day time).
- On the cliff is a bunger roaming around.
- Position the launch pad near the edge of the cliff, close to the cheepoth.
- Lure the bunger to the launch pad, with ketchup, and shoot ketchup at the launch pad so it stands on it.
- Launch the bunger at the moth. It'll knock it out of the air, give you the achievement, and you can go catch it for the quest you are on.