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