Serious Sam Classics: Revolution achievements

Find and kill a Serious Sam developer in versus multiplayer.

Finish the Bright Island campaign in single player.

Find Bright Island's second secret level.

Find Bright Island's first secret level.

Finish the Bright Island campaign in cooperative.

Kill 100.001 enemies.

Kill 50 players with mines.

Kill 100 monsters with mines.

Kill 5000 marsh-hoppers with the chainsaw.

Mess with the gravity for a total of 60 minutes.

In singleplayer, beat the last level of The First Encounter or the last level in The Second Encounter in the "I am Ugh-Zan" difficulty.

Kill 500 people.