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