Full list of all 17 Nephenthesys achievements worth 2,000 gamerscore.
The base game contains 12 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 1,000 Gamerscore.
Kill 100 enemies.
Kill 1000 enemies.
Kill 2500 enemies.
Collect 5 upgrades.
Collect 50 upgrades.
Collect 125 upgrades.
Beat stage 1.
Beat stage 2.
Beat stage 3.
Beat stage 4.
Beat stage 5.
Score more than 50,000 points in a single run.
Kill 2750 enemies.
Kill 3000 enemies.
Kill 3250 enemies.
Kill 3500 enemies.
Kill 3750 enemies.