In-depth combat and ragdoll effects with multiple types of ranged and melee weapons that all perform and act differently.
Story-driven gameplay through interaction, dialog, mission, choices, etc.
Companions with individual AI and unique dialog.
Unique equipment system, the player can equip a One-handed weapon, an off-hand, a heavy weapon, a ranged weapon, a shield, armor, helmets, hoverbikes, datapads, and utility items.
Hoverbikes for travel and racing, with unique hoverbike mechanics and multitudes of hoverbkes that all perform differently.
Ship and crew system allowing the player to travel the galaxy with their companions.
Minigames like hacking, engineering, lockpicking, and scanning.
Crafting and augments, players will be able to augment their weapons and armor with augment slots at specific workbenches.
Living environment (to a degree) with hovercars flying around, NPC's walking around, performing actions (like hopping on a hoverbike and flying off), talking to eachother, sitting down, sleeping, enemies wandering about, etc. Similar to games like Skyrim.
Complex entity interactions with other entities, with a weighted faction system allowing certain animal types to attack eachother, or multiple groups of enemies fight one another, or 2 entities getting into a brawl in a bar.
Afflictions there are a number of afflictions that can be afflicted by damage or affliction areas that affect all entities. Including a live mutation system that mutates living creatures and turns them against others.
Combat attack combos, power attacks, dodging, blocking, etc.
NPC & Enemy AI and scripted control
Complex Dialog and Realtime Lipsyncing
Swimming and underwater areas
Ship flight and possibly space combat
Minigames related to skills
Stats and Attributes system
Weighted entity factions (allowing for complex interactions)
Equipment and Augment system
Crafting and schematics system
Thorough tutorial help system
And so much more but it's getting late.