One of the big differences between XCOM and XCOM 2 are mission types. Instead of Abductions you have Guerrilla Ops, and instead of Terror Missions you have ADVENT Retaliations (losing and ADVENT Retaliation mission wont make you lose that territory, but it will decrease the supplies income).
|You can only choose one at a time. Hidden Dark Events can be revealed with Intel, either on the first popup, or by clicking the tag under the Avatar Progress counter. Choose based on what is a greater threat to you (usually the 'free +1/+2 Avatar Progress' events unless there's an easily accessible facility on the geoscape) or go by reward, or whatever mission contains a hack (only mission-critical hacks can yield the elusive "Enemy protocol" reward).|
|Protect Device||-||yes||Protect the device and kill all targets||Varied + Countering a Dark Event||Late game this mission might get hard due to powerful enemies attacks|
|Destroy Device||8||yes||Destroy the device and kill all targets||Varied + Countering a Dark Event||The ability to MC or hack control of an enemy unit makes this easier|
|Hack Workstation/Recover Item||8||yes||Hack/Recover and kill all targets||Varied + Countering a Dark Event||Bring a Specialist: their ranged hack makes this significantly easier: LoS is range.|
|Secure VIP||12||no||Extract VIP and all soldiers||VIP + resources||VIP starts with you. Extraction zone is fixed and remote.|
|Rescue VIP||12||yes||Extract VIP and all soldiers||VIP + resources||VIP doesn´t start with your soldiers: may appear locked in a cell or an ADVENT van: bring a Specialist. Extraction zone is fixed and remote.|
|Neutralize Dark VIP||12||yes||Capture or kill Dark VIP + extract all soldiers||Supplies + Intel||If you kill the Dark VIP you don't get the Intel. On proximity, you get the 'Knockout' command, then Carry option: soldier carry rules are in effect. Extraction zone is fixed and remote.|
|Supply Raid||-||yes||Neutralize all enemies||Alloys + Elerium||Beware of AoE attacks, don't destroy the resources: they are the glowing boxes. Keep in mind that vehicle and other object explosions have some range.|
|UFO Recovery||6||yes||kill all targets||Alloys + Elerium||After you break concealment a beacon will activate, you have 6 turns do deactivate it or reinforcements will be deployed.|
|ADVENT Retaliation||-||no||save at least six civilians and kill all targets||Supplies income increased||Like in Enemy Unknown/Within; living civvies still on the map are auto-rescued once all enemies are dead. Failing to rescue 6 civilians reduces supply income. Failing to secure the area loses the territory entirely.|
|ADVENT Facility||-||yes||Plant the X4 and evacuate||AVATAR progress decreased by point amount displayed under facility on map||Expect drops once enemies are dead, when the charges are set, and another on your way to extraction.|
|Avenger Defense||-||yes||Destroy the Disruptor, don't let enemies inside the ramp||Not losing the game||Defense Matrix helps a lot to camp the ramp, upgrade if you can. MCing and/or Hacking is VERY useful: have the controlled enemy unit take out the Disruptor, while your soldiers retreat, as ADVENT will be airdropping new enemies first every other turn, then eventually every turn.|
In addition there are several special one-off storyline missions.