Advancement
EXPERIENCE
The completion of a mission gets you XP depending on how difficult it was. Once you've accumulated 1,000 XP, you level up, reduce your XP by 1,000, and essentially start over.
Learning from your Mistakes
During encounters that are life-threatening and average difficulty or worse, you can choose to turn one attack, save, or check you make opposing a dangerous foe or obstacle into one degree less successful than it actually was (critical success --> success --> failure --> critical failure). You get +1 XP per time you do so (+2 if Hard, +3 if Very Hard, +4 if Overwhelming) to a max of 3 times per scene.
ABILITIES
At 1st level, you begin with 3 special abilities of your choice and 3 from your origin (possibly more if the origin came with weaknesses). Every level thereafter you can gain a new ability of your choice or upgrade an existing ability.
ATTRIBUTES
At 5th and 15th level, you increase 4 attributes of your choice by 1. At 10th and 20th level you increase all of your attribute scores by 2.
PROFICIENCIES
At 1st level you begin trained in 3 defenses and (5 + INT) skills of your choice.
At every even level after 1st (2nd, 4th, 6th, etc.), you can increase your proficiency rank in one skill of your choice up to a maximum of versed.
At every odd level after 1st (3rd, 5th, 7th, etc.), you can increase your proficiency rank in one defense of your choice up to a maximum of versed.
This maximum increases to expert at 10th level, master at 15th level, and legendary at 20th level.