If you name your character “Doom Guy” or “Doom Gal”, your character yells, “RIP AND TEAR!” And “OH ZOMBIES COME OUT TO PLAY!” And “EAT IT SHITHEAD!” when you kill netherworld inhabitants or zombies. Also you do extra damage when standing on blood covered tiles.
Add item called Sticky Gel that can be applied to everything. You can now wear the sticky items and only be affected by weight and not volume. Though if taken off, it causes damage to clothing or pain.
If you acquire too many items that are stuck to you, the sticky gel melds with your flesh, basically turning you into a katamari damachi ball. You can then roll over NPCs and zombies and gain armor from their bodies.
But wait theres more.
Upon reaching a certain weight, you reach critical mass and collapse into a black hole. It kills you and destroys your world, forcing you to generate another one.