Orbital Defense Force

Orbital Defense Force is a co-op shoot ’em up roguelike for 1–4 players. You play as mercenaries taking contracts from the O.D.F. (Orbital Defense Force) agency to defend planets from invaders. Complete waves, earn scrap and spend it on ship upgrades and repairs before taking on more contracts and trying to survive long enough to face the Elite Generals.

Contracts and co-op

You and your team vote on which contract to take next. More difficult contracts pay more scrap, which you can spend on randomly rolled items in the shop between levels.

Mercenaries and upgrades

Choose from 9 mercenaries, each with perks that benefit the whole team. Their abilities include support effects that reflect bullets or stun enemies, as well as damage abilities such as lobbing large grenades. O.D.F. has over 160 items with supportive or damaging effects, and each mercenary also has access to a set of items unique to them.

Enemies and bosses

The game features over 20 types of basic enemies, with different bullets and movement patterns. They range from small ships with little health to large, heavily armoured ones; some fire EMP stun bombs, others use large armour-piercing sniper bullets, and one has TNT strapped to it. Enemies spawn randomly, so each wave differs from previous runs.

There are 19 unique bosses, each with its own attacks and themes. All bosses except the Elite Generals are selected randomly for each level.