"The Grouch" and "A Leading Light" - can be obtained in first tutorial mission

All boss achievments - Complete carrer

"Tour Hunter" - Drive 1000km - can be easily obtained after beating carrer

Weapon Achievments - Use every weapon 10 times

"To The Junkyard" - Destroy your car - can be easily obtained in Deathmatch (multiplayer)

"Autobahn Speedhunter" - Drive 300km/h for 15 seconds - Go to single race, disable traffic and enable nitro, choose "The Autobahn" race and pick the fastest car (Razor CTR).

"To The Moon!" - Jump 100m - Go to single race, enable nitro, choose "Getting air on the highway" Autobahn race, and jump at the rising bridge, or can be obtained in mission "Deliveries Suspended"

"Scratchless" and "Driving on Eggshells" - Complete racing lap and whole race without any damage - Go to single race, choose shortest track "The Oval" and pick 1 lap.

"Hotshot" - Destroy 10 enemies - Can be obtained during carrer

"Sunday driver" and "Riot" - Crash into and Expoled 100 traffic cars - Go to single race, disable damage and enable nitro with Rush Hour traffic,choose any map (Except The Autobahn and Racetrack ones) and choose a fast car (Razor CTR is the best) and start crashing to traffic at 175km/h+ to explode them

"Traveler" and "Petrolhead" - Unlock every track and car in game - Obtained after carrer

"Test Driver" and "Track Tester" - Drive on every car and track - You can do them both at same time, I recomend to take notes for what you left do drive, use this set up for races:

Nitro: ON
Car Damage: OFF
Weapons: OFF
Traffic: OFF
Num. of Enemies: 1
Laps: 1
Difficulty: EASY

"Amateur" and "Pro" - win 10 and 50 times in single races - You can do this achievment when doing "Track Tester" above, and then do wins on "The Oval" if some left