My task for now is thinking towards this series called Cruel Worlds (CwS)
1.) World War
2.) World War 2
3.) World War 3
4.) World War 4
5.) World War 5
6.) Outer War
7.) Outer War 2
8.) The Last War

World War 4 And Up Have Something Called Agent Ops and on the last mission of Agent Ops in WW5, unlocked by completing the campaign and all the agent ops missions, a zombie shows and then Outer War and Outer War 2 have space zombies (zombies with messed up astronaut suits) and the last war has flashbacks of the people who die in the other games and I might make more after but 1st I decide..