A ruleset for sci-fi, futuristic and modern campaigns based on 13th Age Archmage Engine (http://pelgranepress.com/index.php/the-archmage-engine-13th-age-srd/) and inspired by the Nova Praxis game setting (http://www.voidstarstudios.com/nova-praxis/).
Here are some of the main differences from the 13th Age base system:
Classes: there are 5 classes, designed around this ruleset. The archetypes they refer to should be fairly evident.
'Sleeves': these are the types of bodies available to characters. They work as races.
Augmentations: those are available according to the sleeves. They kind of cover a space in between 'magic items' and feats.
Multiclassing: the system allows multiclassing freely between any two of the classes, which should allow for a fair degree of flexibility in characters building.
Scaling: to achieve a more 'realistic' feel, scaling of health and damage is flatter, with increases per tier rather than per level. Progression across levels is mostly horizontal (talents, powers...).
Action Points system: this is a new system to allow generating and spending those points during the game, as a resource to utilise for various outcomes.
Battle+ powers: Daily powers have been (mostly) replaced by special Battle powers which require Action Points expenditure.
Health and Healing: there is Shields System (think Mass Effect) providing for self-recovery through temporary hit points.
Cover system: to provide a simple way of modelling shootouts type of combat within the 13th Age framework.
Feats: there are no feats. However nothing prevents from writing some and integrating them into the system.