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