Duke Nukem 3D - More guns at final Boss

Shrapnel City: Tier Drops
There is a tenth level on Shrapnel City called Tier Drops. To get there, go to the movie level and go to the stage with the NASA sign and the body parts with a telescope. Kill the alien with the chain gun and press [Use] on the sign. A door should appear with the caution sign that ends the level. Do not go to the stage with the ship, or this will not work.

Shrapnel City: Secret level
Go to the Hotel Hell level and go to the fountain by the pool. Step through the waterfall, then go behind a bush. You will see a radioactive waste sign like the ones that mark the end of a level, except it is gray. It will take you to the secret Freeway level.

Gallery Art:
Collect the indicated amount of Xbox Live Gamerscore points to unlock the corresponding art.

Bad Cop concept art: 0 points
Pig Cop concept art: 10 points
Octabran concept art 1: 30 points
Octabrain concept art 2: 30 points
Sonic Resonator concept art: 50 points
Jetpack concept art: 50 points
Alternative Pig Cop concept art 1: 70 points
Alternative Pig Cop concept art 2: 70 points
Duke's Vehicle concept art: 90 points
Trooper Recon Car concept art: 90 points
Duke Nukem Forever screenshot 1: 200 points
Duke Nukem Forever screenshot 2: 200 points

Achievements:

1. Piece of Cake
Complete "L.A. Meltdown" on any difficulty or in co-op.25 points

2. Let's Rock
Complete "Lunar Apocalypse" on any difficulty or in co-op.25 points

3. Come Get Some
Complete "Shrapnel City" on any difficulty or in co-op.25 points

4. Game Over
Complete "The Birth" on any difficulty or in co-op.25 points

5. Duke's Mighty Foot
Step on 40 enemies after using the Shrinker on them.10 points

6. Looks Like Cleanup on Aisle 4
Step in a pile of excrement.10 points

7. Shake It Baby
Tip an exotic dancer.10 points

8. Oomph, Uugh, Where is it?
Find 70 secret areas.10 points

9. Alien Maggots are Gonna Pay
Finish the "Hollywood Holocaust" level in under 3 minutes.10 points

10. Gonna Rip Em' a New One
Get 100 total kills in ranked Dukematch games Online.10 points

11. See You in Hell
Get 250 total kills in ranked Dukematch games Online.15 points

12. Hail to the King, Baby
Earn respect and get 500 total kills in ranked Dukematch games Online.25 points