Full list of all 20 Gerbil Physics achievements worth 200 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Windows Phone.
Collected 8 Wipeouts by being fast or frugal with weapon usage.
Collected all pickup items with a single bomb and gerbil on site 10. Sink.
Used at least 10 bombs on a single site.
Disintegrated a Red Alarm Gerbil.
Completed the site 9. Be Decisive using only one Disintegrator.
Avoided the alarm gerbils on site 4. Collateral.
Collected one Wipeout by being fast or frugal with weapon usage.
Got a pickup.
Got one Gold Chest.
Complete the site 25. Spooky using only one Exploder.
Make a gerbil spin around 12 times on site 35. Newton's Gerbil.
Demolish 36 Gerbil Sites.
Collect 16 Wipeouts by being fast or frugal with weapon usage.
Avoid detonating any penguins on site 72. Bad Neighbors.
Demolish 72 Gerbil Sites.
Get 36 Gold Chests.
Complete site 41. Two Seasons in 32 seconds.
Get 72 Gold Chests.
Score 20,000 points.
Score 40,000 points.