Here is the full list of all 44 Micro Machines World Series achievements worth 1,000 gamerscore.
Used ultimate abilities 10 times
Hit 3 opponents with a single Life Ring as Captain Smallbeard
Reached level 20
Collected 100 items
Completed an event in a group
Reached level 10
Won a race without being destroyed on 10 different tracks
Destroyed 2 opponents with a single Rapid Fire as G.I. JOE MOBAT
Marked and destroyed an opponent as Lt. Shields
Used Agent Atom to Flashbang 3 opponents within 3 seconds of leaving Stealth
Destroyed 5 players after using a teleporter
Collected 50 items
Shattered a frozen opponent as Viktoriya Tennikost
Destroyed a burning enemy with El Incendio's Nitro Tank
Hit a burning opponent with a COBRA H.I.S.S Heat-Seeking Missile
Destroyed all 3 opponents in a single life during a local free-for-all match
Pushed 10 opponents into buzzsaws
Completed an online event with every vehicle
Reached the Silver division
Completed a public match during a season
Finished an event using a newly equipped item
Completed an online event
Completed a special event
Won every round in an elimination event
Completed the tutorial
Get all other achievements
Reach level 30
Reach level 40
Prestige for the first time
Collect all items for a single vehicle
As Dr. Mel, resurrect every player on your team in a single battle
As Hank N. Stein, destroy 3 flag or bomb carriers that have been slowed by your Earthquake.
Use Yu Saiko to destroy 3 opponents in a single Black Hole
Use one of Jack Hammer's boosted Sentry Turrets to destroy 3 opponents
Use Chief A. Blaze's Foam Blast to put out flames on 3 teammates at once
Push 5 opponents into the lawn mower in a single battle
Destroy 5 opponents while you're riding on a drone
Feed a player to the hippos
Get an assist on an opponent destroyed by the Ouija board
Destroy an opponent by pushing them into a laser gate
Win a King of the Hill game without letting the opposition get a single point
Destroy an opponent within 1 second of them picking up your flag
Take a bomb from your base and explode the opponents' base without dropping it
Push 3 opponents into hazards in one round of a local elimination match