Gun mods - every gun you own comes back as Mk II and Mk III mods, each adding something new: ricochets, burning pellets, seeking rockets, stuns, shrapnel and more.

Evolutions - a Mk III gun with its paired upgrade evolves into a new weapon: the Singularity Pistol, Breach Cannon, Needle Storm, Pulse Lance, Annihilator, Solar Repeater, Payload Cascade, Storm Conductor, Flechette Tempest or Absolute Zero.

Mutations - 12 run-changing loot cards, from kills that detonate and a freezing dash to a field that heals the whole team. Four are in every loot pool; unlock the rest in Research.

Strains - spend samples on a starting loadout with its own gun or mutations.

The Director - a new final boss on round nine. It releases Apex or Patient Zero from containment, shields itself while that boss lives, then vents reactor shockwaves you have to jump or dash through.

Breach Levels - win the Campaign to unlock ten harder levels, each worth more score.

Daily Breach - one seed a day, the same for everyone, with its own leaderboard.

Play a Seed and Copy Seed - replay or share any seed.

Bots - play Versus, co-op Campaign or co-op Survival offline with one to three bots, or fill empty seats in your lobby.

Revives - hold E beside a downed teammate for three seconds to get them back up.

Leaderboards for the Daily Breach, the fastest Campaign victory and the highest Breach Level, and a friends filter on every board.

Codex - 26 research files on every hostile and on what happened to the facility.

Controller support, menus included, with aim assist and rumble.

Exit Game on the title, pause and results screens. Thanks to the review that asked for a leave button!

Every enemy wind-up has its own sound, heard from the direction of the enemy, and Survival, Versus, boss fights and the Director have music of their own.