1
Invasion
2
Training Day
3
Science Has Failed Us
7
Your Homes Aren't Safe
8
The Laboratory
9
Alien Nest
11
Fight For Your Lives
12
Against the Odds
13
Plan 10 From Outer Space
14
Taking the Fight to Them
17
Squad Up!
19
Operation Electric Honeycomb
20
The Thing From Another World
21
Operation Turtle and Hare
22
Empty Hallways
24
The Pink Menace in the Shadows
25
Bring It On
26
These Were Quiet Streets
30
The Ruins
31
A Signal From Another World
32
Rationing Hope
33
They're Out There Somewhere
34
Reestablishing Contact
35
Take Them Down
37
Look to the Stars
44
What Lies Ahead
45
Science Has Failed Us (In-Game Version)
46
Against the Odds (In-Game Version)
47
The Ruins (In-Game Version)
48
Operation Turtle and Hare (In-Game Version)