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
Location 5 Finished
Mutant boss killed
Finished a level with over 25% accuracy
Location 4 Finished
99x multiplier
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
Location 2 Finished
50 checkpoints collected in Racing bonus level
25 checkpoints collected in Racing bonus level
Maxed out the weapon level
Recharge to full hitpoints in Recharge Area
50x multiplier
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
20x multiplier
Turned 5 enemies into flames with one Napalm
10 special weapons collected (but not used yet)
1 Million score
10 Kill combo
Full armor collected
5 Kill combo
Killed a civilian
Drive over 10 enemy drivers in one level
100K score
Tutorials passed
2 Kill combo
Killed an enemy driver