Home-brew Rules

Combat

When you score a critical hit (20 on a d20) with a spell, melee, or ranged attack, you deal maximum damage plus an extra roll of the damage dice. For example, if you hit with a short bow, you roll 1d6 and add 6 (the highest possible result on a d6).
The outcome of your death saving throws will be hidden from the party.
You may use an item (such as a potion) on a bonus action. This is at the discretion of the DM. If the item is large (such as turning off a magical device) DM might make it a whole action.
Certain positions on the battlefield will aid/hinder attacks. Range is .5 to +5 (ex. someone shooting a ranged attack from high ground gains +5 to attack roll)

My campaigns are hard hitting. So instead of rolling for HP you will take max roll every level. i.e. 1d8 will give 8 extra hit points.

If it is not in the book, don’t worry. If something seems appropriate and fun we will figure out a way to do it, or at least to try.
Skill checks when not proficient are at disadvantage. You cannot provide help to someone performing a skill check if you are not trained in that skill.