Duke Nukem 3D: 20th Anniversary World Tour

A good method for getting kills is on the level ‘Overlord’ in Episode 2 just before the boss. This achievement is cumulative, so save your game just before the area, kill everything then reload your save. You should get approximately twenty kills each run in a matter of seconds. If you are using your saved game from the “Rage Engage” achievement, then just reload that save. If not, here’s the description from the beginning of the level.

When the level starts, activate the cheat menu. Turn ‘God Mode’ on, ‘No Clip’ off and select ‘Give All.’ Make you way through the tunnel and emerge from the water when it opens up. Directly on the opposite side of the tunnel you were in is a vent near the ceiling. This vent is only accessible if you have a jetpack or if you are using the ‘No Clip’ cheat. Shoot it out and enter the short tunnel. At the end you will see a large rotating gear (there will be an Octabrain floating around so you can kill it or not; it’s up to you). Before continuing, press or to equip the pipebombs (actually the Devastator works much better because it shoots faster). Walk forward and drop down the shaft into a circular green room lined with eggs with a giant door at one end.

As soon as you land, pause and save your game. Then walk towards the eggs so they start to hatch then start throwing pipebombs or shooting the Devastator around the room until all the eggs are destroyed. This should take about 5 seconds. At that point, reload your save and do it all over again until the achievement unlocks.

NOTE: It is recommended that you save this achievement for last as you will be killing enemies to unlock other achievements. You should have accumulated +/- 300 kills before farming here for the rest. Doing so will only take around ten minutes.