Space Marines receive a +5 bonus to strength, dexterity and constitution. (Included in Character sheet)

Their 1st level HP is equal to 20+class+Constitution and increases by 10+class+Constitution with every level. (Included in Character sheet)

Instead of rolling a hit die a space Marine can regain 5+2xhit die when out of combat.

However, Of a thousand aspirants one may survive the trials and become an Astartes. When rolling for physical traits roll 4d6 and drop the lowest then reroll if the result is 8 or below.

The transition to become an Astartes is harrowing and takes its toll, when rolling for mental stats roll 2d8. No rerolls are allowed for mental stats.

Until 3rd level a space marine is not trained to utilise their powers to the full and are considered initiates to their chapter. 

- They cannot wear power armour and can only wear scout armour. 

- They have proficiency with Astartes Shotguns and Simple Melee weapons

- They cannot benifit from the Martial Advantage Trait

- At 1st level they suffer a -4 Dexterity and -2 Constitution modifier.

- At 2nd level they suffer a -2 Dexterity modifier.

At 3rd Level an Astartes gains proficiency with bolt weapons and 3 Martial Melee weapons

- Unblighted. The space marine has advantage on saving throws against poison, nonmagical diseases. (included in character sheet)

- Keen Senses. Astartes have expertise in passive perception. (included in character sheet)

- Sus-An Membrane and Laramans Blessing. An incapacitated Astartes Passes their death saveing throw on a 7.

- Catapleasan Node. An Astartes may use their passive perception to detect threats while asleep. An Astartes requires 4hrs to complete a long rest.

- Beltchers Gland. As a free action an Astartes may spit acid at an object within 5 ft doing 1d6 acid damage. (included in character sheet)

- Omophage gland. Consuming the flesh of an enemy grants advantage on the next insight check against that creatures allies.

An Astartes cannot be frightened 

Martial Advantage. An Astartes may make an additional attack when using the Attack action.

An Astartes may make two reactions in combat. 

If an Astartes is within 10ft of another Astartes from the same chapter then they may make an additional bonus action on their turn or use both their bonus actions to make an additional action.

Beyond 6th level an Astartes can make an additional action and an addition bonus action, they can still use both their bonus actions to make an additional action.

Only equipment specifically designed for an Astartes will fit them. All armour or weapons not designed for an Astartes or similar sized creature confer a negative 4 dexterity modifier. An Astartes can't have proficiency with equipment that isn't appropriately sized.

Beyond Level 3 an Unarmoured Space Marines AC is 13+Dex.