The following amounts are the same regardless of the difficulty.

Drone: 1XP
Warrior: 2XP
Gunner: 10XP
Tiger: 50XP
Grenadier: 100XP


Repair: 1XP
Paid Respects: 5XP (Interact with a dead player)
Healed Ally: 5XP
Rearmed Ally: 10XP (Someone refilling using your Ammo Fabricator)
Revived Ally: 10XP


Trooper Extracted: 25XP (per survivor)

AAS Complete: 250XP
ARC Slam Complete: 500XP

Wave Completed: 50XP (per wave)


Assuming the following events will have XP bonus in future updates:
- Retrieve Lost Resources
- High Priority Targets (Exterminate Bugs)
- Repair The Generators / Restore The Power Generators
- Secure The Signal Booster


Egg Destroyed: 10XP (each)
Hive Core Destroyed: 50XP (each)
Hive Hunt Complete: 50XP


- Building / Repairing / Destroying base structures
- Carrying / Depositing Gas Canisters back to base
- Saluting the flag on top of dropped bunkers in AAS
- (Hive Hunt) Placing Light Beacons
- (Hive Hunt) Setting a nuke on a hive

Bugs Inbound!: Random timed event (that feels like the holdout event defending the ARC before extraction)
We Got Bugs!: Bug attacks at the start of the match
Threat Level: Maximum: Start at Level 5 infestation
Threat Level: Caution: Start at Level 3 infestation
Double Threat!: Infestation level increases are DOUBLED
Increased Patrols: More bug packs spawn

Ambush!: Increased ambushes during a mission
Drone Ambush!: Increased Drone ambushes during a mission
Warrior Ambush!: Increased Warrior ambushes during a mission
Gunner Ambush!: Increased Gunner ambushes during a mission
Tiger Ambush!: Increased Tiger ambushes during a mission
Grenadier Ambush!: Increased Grenadier ambushes during a mission

Arachnid Packs: Spawns a group of bugs near the base
Drone Packs: Spawns a group of only Drones
Warrior Packs: Spawns a group of only Warriors
Gunner Packs: Spawns a group of only Gunners
Tiger Packs: Spawns a group of only Tigers
Grenadier Packs: Spawns a group of only Grenadiers

Elite Arachnids: ALL bugs have increased damage but reduced speed
Elite Drones: Drones have increased damage but reduced speed
Elite Warrior: Warriors have increased damage but reduced speed
Elite Gunners: Gunners have increased damage but reduced speed
Elite Tigers: Tigers have increased damage but reduced speed
Elite Grenadiers: Grenadiers have increased damage but reduced speed

Armoured Arachnids: ALL bugs are highly resistant to explosives
Armoured Drones: Drones are highly resistant to explosives
Armoured Warriors: Warriors are highly resistant to explosives
Armoured Gunners: Gunners are highly resistant to explosives
Armoured Tigers: Tigers are highly resistant to explosives
Armoured Grenadiers: Grenadiers are highly resistant to explosives

Arachnid Rush: ALL bugs have increased speed but lower health
Drone Rush: Drones have increased speed but lower health
Warrior Rush: Warriors have increased speed but lower health
Gunner Rush: Gunners have increased speed but lower health
Tiger Rush: Tigers have increased speed but lower health
Grenadier Rush: Grenadiers have increased speed but lower health

Arachnid Fury: ALL MELEE bugs have increased attack rate
Drone Fury: Drones have increased attack rate
Warrior Fury: Warriors have increased attack rate
Tiger Fury: Tigers have increased attack rate

Arachnid Resilience: ALL bugs have double health but reduced speed
Drone Resilience: Drones have double health but reduced speed
Warrior Resilience: Warriors have double health but reduced speed
Gunner Resilience: Gunners have double health but reduced speed
Tiger Resilience: Tigers have double health but reduced speed
Grenadier Resilience: Grenadiers have double health but reduced speed


Sandstorm: Visibility reduced
Pitch Black: Playing in darkness / Night time
Patrol Disruption: Less bug packs spawn
Explosive Mace: Upgraded Melee weapon

Scan Blade: Melee a bug highlights it (like a scan grenade effect)
Armoury Mixup: Random loadout
Mk1 Optic Field Test: Primary weapon replaced with a Morita Mk1 (first weapon)
Pilum Surplus: Secondary weapon replaced with Pilum Rocket Launcher

Out Of Grenades: No grenades available
Grenade Field Test: Start with random Grenades
Grenade Surplus: Additional grenades
Scan Grenade Field Test: Start with Scan Grenades

Build Tool Malfunction: Build speed decreased
Build Tool Optimization: Build speed increased
Low Gravity: Can jump higher, fall from greater heights
Integrated Health Stims: Regenerate health over time

Integrated Utility Fabricators: Slowly fills utilities
Reviving Disabled: No reviving possible
Martyr: Explode on incapacitation (instant death, no revive possible and can hurt allies)
CM-48 Nightstar Field Test: Melee weapon replaced with tactical mace

- Ammo Fabricators can be a great source of XP if placed strategically as each time a team member uses it, you get 10XP which can quickly stack up:

• Place an Ammo Fabricator next to barricaded Bastions that are defending a key location. You get XP whenever they refill ammo and they help protect you and others in return.
  
• Placed near key locations in general such as Refineries making it easier for defenders.
  
• Place Ammo Fabricators near bunkers to help out the occupants that are defending the base. Also place where there is no Ammo in an area of defence.

- Using the Med Bot to revive multiple downed allies at once can give a nice chunk of XP. Given the long cooldown it might be worth to hold using it until someone is seconds away from dying, in the event others go down after you've used it.

- Playing on a harder difficulty doesn't change how much XP you get, only a higher chance of spawning Tigers and Grenadiers. You can still get a nice amount playing on Easy difficulty and Tigers and Grenadiers go down quick so easy XP if you're fast enough.