Unmodified.

Battleragers are re-fluffed as Space Marines! That's why they basically cannot leave their armors.

• Racial limitation is removed
• Battlerager Armor damage when grappling now is 3 + Str modifier
• Reckless Abadon is now a Resistance to all kind of Damage

Battlerager are fun, but they kinda pale compared to other Barbarians. A part of the extra attack that is nice the other powers are kinda lackluster. In particular Reckless Abadon is just few HP more. So, if players want to play a wrestler, the grappling damage is increased. The Reckless Abadon power is not inspired by the Bear totem. But those Barbarians take the power 3 levels earlier and they can get other interesting totem powers after, to compensate Reckless Abadon also give resitance to psychic.

Berserkers are refluffed as super soldiers. But mechanically there is only one change.

Mindless rage. Beginning at 6th level, you can't be charmed or frightened while raging. If you are charmed or frightened when you enter your rage, the effect is suspended for the duration of the rage. Besides, when in rage, you can use Stimpaks ignoring the negative effects.

Stimpak, or stimulation delivery package is a syringe for containing and delivering medications and drugs. When activated, with an Action or Bonus Action, on a willing creature it has negative and positive effects. As negative effects, the creature start having tremors and rigidity getting the Poisoned Condition and having him or her speeds lowered by 10 feet (speeds cannot go under 0 feet). As positive effect, the stimpack reduces the creature’s exhaustion level by 1. The negative effects last until the creature as completed a long rest. The precision needed to activate the stimpak makes impossible to use it on a unwilling creature.

You can change your Environment once per long rest.

WIP