Rocket League

Obvious...

You can do this before even your first race - head into the garage and customise something, anything.

Easiest against the AI in single player, Amateur difficulty.

You'll get this soon enough - just a cumulative 5 mins of turbocharging.

You'll get this soon enough while working for the others - its not worth paying particular attention to.

Easiest in a 1v1 single-player against amateur bots.

You should get this sooner or later just by playing, preferably online.

See also Clean Sheet and Triple Threat

There are 6 orbs around the pitch; in each corner and diagonally opposite to the goals - picking up one charges the boost to 100%. Then hold the boost button to empty it. This is easiest done in a bot match when you've already got whatever points/goals/lead you need and you just want to keep the ball in play until the end.

You don't actually have to be going backwards for this - you can be travelling forwards, go under the ball to end up just in front of it, and hold reverse to slow and tap the ball with your rear end - kicking it up into the air. This can be an easier way to get the achievement (even accidentally!) than trying to actually drive backwards!

for this achievement you can get it by completing a few online matches because by the time you level up to level 10 you will have unlocked more than 50 customization items.

Easy to do from the beginning; head into the garage and on each tab just choose a different item. If you've nothing to select... ...play some matches to unlock items or get some DLC.

Easiest single player against amateur AI; especially if you boost straight toward the ball at kickoff and get an angle for an on-target shot. Sometimes the AI will leave one car back in defence but most of the time you can get the goal straight from kickoff!

See also Clean Sheet and Triple Threat

This will be surprisingly easy if you play the field. To assist, you must be the last person to hit the ball before somebody else (on your team) puts it in the goal. In each of these cases you'll know they happened because you'll get points for doing it and this will show on-screen.

See also Clean Sheet and Triple Threat

You'll get this naturally by just continuing to play and complete matches.

Painted items, like Certified items, are a random drop after playing online matches. Painted items are like normal ones, but a different colour (surprise, surprise!). They are named differently too; e.g. painted wheels are listed as Exotic, painted bodies/boosts are listed as Import, and painted toppers are listed as Uncommon.

Select the Rumble game mode in an exhibition match. A random powerup is awarded each time the countdown runs out. Eventually you'll get all 11. Be sure to use them quickly so you can get the next one.

In the training menu off the main menu. You'll get this on the way to Drill Sergeant

For an Aerial goal, the ball has to be in the air and you have to be in the air. Once you Git Gud then this will be obvious - but its pretty hard as you start out. Use the practise drills to work it out - but ofc practise won't get you this achievement.

Easiest in single player against bots - but likely 1v1 as the bots are a liability in themselves if they're on your team...

Start a Season in the single player section, and win the first match. Easy!

Decals are car-specific so anything you can put on each of these cars is fine. Supersonic Fury DLC pain finishes are: Brushed Metal, Carbon Fiber, Metallic Pearl, Pearlescent and Wood.

After an exhibition match, hit the Save Replay option, then start to watch it immediately.

Prototype/in-development arenas with a VR/tron-like look and feel.

Use the takumi car, do a full circle drift in each wheels - can be done quickly in a bot match.

Try to get this at the same time as Hot Shot, Part Two

Certified items are car cosmetics that are randomly awarded after online matches. You can see in the garage as they'll say Certified in the info panel - along with whatever you need to be doing in an *online* match to level it up. Equip, and do it! You'll get this on the way toward Certifiable

In Training off the main menu - do the three role-specific pieces. You'll get Know the Drill on the way to this. Any difficulty is fine, you don't have to score/save all goals, you just have to get to the end of all 10 shots.

Shutout means you win and the opposing team doesn't score any goals. Easiest in 1v1 against a rookie bot offline.

You'll get this automatically during the course of a season; its inevitable.

This is quickest to grind through in 1v1, against a bot. It'll likely take 3-4 games, and help you toward Full Course at the same time.

Head into multiplayer (you don't have to actually play!), and select Arenas - in there use all your Like and Dislike votes and the achievement will pop. This just takes a few seconds to do and can be done anytime!

AS with many of these achievements - likely easiest 1v1 against a rookie bot offline.

Easiest in 1v1

Its a bit easy to forget about this one if you don't do the season all in one go! Make sure you remember to change back to the right car if you've been doing other things...