v5.2:

Overhauled how the Freeze Grenades are modified for this challenge and fixed the issue of Freeze Grenades not working consistently when thrown at very close targets.

The radius of the AOE knockback damage that comes with meleeing staggered enemies is no longer randomized, but instead scales with base melee damage.

The chance to stagger via melee is no longer fixed, but instead scales with base melee damage and how much damage the target has already taken.

Friendly fire via explosions, if high enough damage, will now cause victims to be knocked down.

If Hardcore Friendly Fire is not enabled, friendly fire via explosions cannot exceed a certain percentage of the victim's maximum health. Does not include self-damage.

Temporary pickups that have no special purposes will no longer be converted.

Greatly reduced Shotgun's alt-fire fire rate.

A few certain weapons that are not whitelisted for usage in this challenge will now be converted into other specific items instead of a random piece of resource.

Fixed chainsaw unable to insta-kill staggered enemies if it was never used, resulting a total of 2 units of durability used instead of the intended 1.

v5.1:

Parasites no longer convert into Xenomites when they are on fire.

v5.0:

Hand Grenades, Freeze Grenades, Trip Mines, and Incendiary Mines can now combine stacks together into a stack of up to 3 charges.

Parasites no longer convert into Xenomites when they are still within eggs.

Carrier drones that are on fire no longer spawn Xenomites.

When dropping, Hand Grenades and Freeze Grenades are now more likely to contain less number of charges within the stack.

Pre-spawned Hand Grenades and Freeze Grenades will now come with 1 charge instead of 2.

Hand Grenades and Freeze Grenades in the starting loadout now start with 1 charge instead of 2.

Increased damage of Medical SMG.

Flamers can now insta-kill Xenomites and Buzzers with direct damage.

Explosive barrels set off by gun drones now also receive the massive damage bonus marines have.

Fixed Uber Drones bypassing the stagger timer reset.

v4.4:

Attack drones no longer deal friendly fire, regardless of whether Hardcore Friendly Fire is enabled.

v4.3:

Parrying Mortarbug/Harvester's corrosive skin no longer deals damage to the Mortarbug/Harvester.

Parrying a Buzzer now guarantees to kill the Buzzer.

v4.2:

Counter damage and melee damage against staggered enemies are now greatly influenced by the marine's base melee damage.

The chance for drones to mutate can no longer exceed 50%.

v4.1:

The bonus damage that scales with the enemy's maximum health is now applied in an AOE fashion.

Meleeing staggered enemies will now reset their stagger timer.

Decreased chance of staggering when meleeing an enemy who is not staggered.

v4.0:

Parries now deal massive damage that scales with the parried enemy's maximum health. (It is now possible to parry a Shieldbug to death in 2 hits)

Slightly increased the time window for successful parries.

Meleeing staggered enemies now deals bonus damage that scales with the enemy's maximum health.

Fixed stamina being spent multiple times at once when melee damages multiple enemies at once.

Adjusted stagger durations of several staggering sources.

Minor fix to bugs related to meleeing staggered enemies.

v3.2:

Fixed kills being able to fire the on-kill script multiple times.

Ammo crates dropped by kills will now always be snapped onto the ground.

v3.1:

Fixed the bug where defibrillators sometimes get unintentionally converted into something else.

Chainsaws will now be deleted when discarded if they were used at all, instead of only when emptied durability.