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.
Got 72 Gold Chests.
Avoided detonating any penguins on site 72. Bad Neighbors.
Demolished 72 Gerbil Sites.
Got 36 Gold Chests.
Completed site 41. Two Seasons in 32 seconds.
Demolished 36 Gerbil Sites.
Made a gerbil spin around 12 times on site 35. Newton's Gerbil.
Completed the site 25. Spooky using only one Exploder.
Scored 40,000 points.
Collected 16 Wipeouts by being fast or frugal with weapon usage.
Scored 20,000 points.
Collected 8 Wipeouts by being fast or frugal with weapon usage.
Disintegrated a Red Alarm Gerbil.
Collected all pickup items with a single bomb and gerbil on site 10. Sink.
Completed the site 9. Be Decisive using only one Disintegrator.
Got a pickup.
Used at least 10 bombs on a single site.
Avoided the alarm gerbils on site 4. Collateral.
Collected one Wipeout by being fast or frugal with weapon usage.
Got one Gold Chest.