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.
Complete the site 25. Spooky using only one Exploder.
Collect all pickup items with a single bomb and gerbil on site 10. Sink.
Collect 8 Wipeouts by being fast or frugal with weapon usage.
Make a gerbil spin around 12 times on site 35. Newton's Gerbil.
Complete the site 9. Be Decisive using only one Disintegrator.
Demolish 36 Gerbil Sites.
Disintegrate something you think you should not touch!
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.
Use at least 10 bombs on a single site.
Get any pickup on any site.
Get one Gold Chest by scoring highly on any site.
Collect one Wipeout by being fast or frugal with weapon usage.
Avoid the alarm gerbils on site 4. Collateral.
Score 20,000 points.
Score 40,000 points.