Slick Stinger
Not unlocked yetDefeat Slick Stinger.
Fattie Swallower
Not unlocked yetDefeat Fattie Swallower.
Tetrachoke
Not unlocked yetDefeat Tetrachoke.
Robots: A Tale of Two Robots
Not unlocked yetDefeat Prime-209 & Tech-X.
Serious Sam
Not unlocked yetComplete the Bogus Campaign on Normal difficulty or higher.
Are you Serious?
Not unlocked yetComplete the Bogus Campaign on Serious difficulty.
Regular Sam
Not unlocked yetComplete the Bogus Campaign without buying any upgrades on Normal difficulty or higher.
Hardcore
Not unlocked yetComplete the Bogus Campaign in Hardcore mode on Normal difficulty or higher.
Tag Team
Not unlocked yetComplete the Bogus Campaign in Multiplayer with at least one other player.
Gunslinger
Not unlocked yetComplete the Bogus Campaign in Single Player using only the pistols on Normal difficulty or higher.
Seriously Fast
Not unlocked yetComplete the Bogus Campaign in Single Player within 60 minutes on Normal difficulty or higher.
Amon-Ra
Not unlocked yetFind the lost artifact of Amon-Ra.
Secret Document
Not unlocked yetFind both parts of the secret document.
Eye of Dr. Platt.
Not unlocked yetTake the eye from Dr. Platt.
Lightersaber
Not unlocked yetFind the Lightersaber.
All Weapons
Not unlocked yetFind all weapons in the Bogus Campaign.
All Stars
Not unlocked yetFind all stars in the Bogus Campaign.
All Extra Lives
Not unlocked yetFind all extra lives in the Bogus Campaign.
All Secrets
Not unlocked yetFind all secrets in the Bogus Campaign.
Auto Shotgun
Not unlocked yetFind the Auto Shotgun.
Duke Nukem
Not unlocked yet
Mr. Buttersworth
Not unlocked yet
Portal
Not unlocked yet
Combat Specialist
Not unlocked yetUnlock everything in the Combat upgrade tree.