In Fallen Earth, characters may advance in rank and abilities regardless of their class or faction. For each rank gained, players earn 2 AP. A player earns 20 AP per level. Some APs can also be gained by completing missions. APs are spent however the player desires, allowing them to raise whatever skills and stats they think are most important.
At each full level, a character also gains 1 point in each stat. Players will get enough APs to max out 4-5 stats and 4-5 skills or mutations. This prevents characters from specializing so much that it limits their playability to a single, narrow focus.
While stats determine the base value for skills, they also calculate the maximum values for Skills, Tradeskills, and Mutation Paths. Raising a stat costs 5 AP.
Skills are learned abilities, such as how to use a weapon or treat injuries. If you raise a stat, the skills that are based on it will also increase, as will the maximum value for that overall skill. Raising a skill costs 1 AP. Equipment and special abilities may modify skills. For example, equipping a rifle limits your Melee Defense Skill, while wearing heavy armor may limit your Dodge.
Tradeskills will help you advance in specialties such as Armorcraft, Ballistics, Cooking, Geology, Medicine, Mutagenics, Nature, Scavenging, Science, and Weaponry.
Mutation Paths give you special abilities, including Alpha Mutations, Enhancement, Nano-Manipulation, Patho-Transmission, Primal, Sonic Influence, Suppression, Telekinesis, Telepathy, and Thermal Manipulation.
All of your Skills fall under the following eight categories: