Rocket League
88 Achievements
1000 XP
20-25h
My World is Fire
Equip the Flamethrower Boost and win a 4v4 Online match
15 XP
0.2%
How to unlock the My World is Fire achievement in Rocket League - Definitive Guide
Now when the match starts, just score into the opponent's goal and pop goes the cheevo!
Additionally, if you use the Scarab or Zippy car, you'll also unlock the Natural Progression trophy, if you didn't already have it.
Edit oct 2020: Looks like they changed the description of the trophy. It used to be "Equip a Chaos Run item and.." but now it's "Equip the Flamethrower Boost and...". I assume that this was changed because the game went free for everyone. The Flamethrower Boost is obtained through randomly getting it them after playing matches. There are coloured versions of the Flamethrower Boost, however those do not count for this trophy so you need the original Flamethrower Boost.
You need to equip the 'Flamethrower' boost (DON'T SELECT THE COLOURED ONES. JUST THE STANDARD FLAMETHROWER
Then enter a private match 4v4 with no bots, 1 goal mutator. Score a goal. Win. Get the achievement.
For this trophy you need to equip the Flamethrower Boost. To do this you must select 'Garage' on the main menu to customise your car using any of new items listed in the Roadmap. I would advise equipping either Merc or Breakout since they are required for other trophies.
There are two ways you can go about this; either play and win a legitimate 4v4 online match against other players (this may be easy or difficult for you depending on skill), or you can do it the very quick and easy way. This is by setting up a 4v4 Private match with no bots, either via Party Only or Name/Password, then go in to Mutator settings and set 'Max Score' to 1 Goal, start the match and as soon you spawn simply score once in to the open goal for a quick, easy victory to unlock the trophy!
Below is a video of myself showing this method: