Kill a Belcher using Belcher collateral barf damage.

Make 20 enemies kill each other using Psychotropic Grenades.

Meet a powerful granny.

Kill an Aludran Reptiloid using nothing but a pistol.

Party like it's 199.

Sign Secchi's rifle.

Head into Rome. Ditch Rodriguez.

Run away from an angry volcano you foolishly antagonized.

Collect scorched aliens for Professor Kiesel.

Kill 5 enemies during a single Time Warp slowdown.

Kill 100 enemies with a headshot.

One-shot kill 3 Werebulls with a shotgun.

Get together with your friends and kill something big.