Helldivers: Dive Harder

Helldivers: Dive Harder is a free upgrade for all existing owners and includes:
A new game mode: "Proving Grounds". Take on challenging missions with unique modifiers.
New loadout system with random- and favorite-loadout options
All previous expansions (A New Hell, Masters of the Galaxy, Turning Up The Heat and Democracy Strikes Back).
Up to 4 player local and online co-op.
Full friendly fire - “accidentally” kill your friends, again and again.
Direct the full might of the military with a wide variety of Support Stratagems.
Community-driven galactic campaign.
A universe of worlds to liberate.
100+ hours of gameplay