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