Here is the full list of all 40 Wasteland Angel achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
All civilians saved in one level
Finished the Story mode
Location 6 Finished
15 seconds of airtime in one level
Location 5 Finished
50 checkpoints collected in Racing bonus level
25 checkpoints collected in Racing bonus level
Finished a level with over 25% accuracy
Mutant boss killed
99x multiplier
Killed 5 enemies with one Nuke
100 Million score
Location 4 Finished
Turned 5 enemies into flames with one Napalm
25 kills in Frenzy bonus level
50 kills in Frenzy bonus level
Location 3 Finished
Tank boss killed
Full armor collected
Location 2 Finished
50x multiplier
Maxed out the weapon level
20 Kill combo
10 Million score
25 kills in Survival bonus level
50 kills in Survival bonus level
Location 1 Finished
20x multiplier
Harvester boss killed
10 special weapons collected (but not used yet)
Drive over 10 enemy drivers in one level
10 Kill combo
Recharge to full hitpoints in Recharge Area
5 Kill combo
1 Million score
Killed a civilian
100K score
Tutorials passed
2 Kill combo
Killed an enemy driver