In my opinion there should zombies mode
The following Things should be kept in mind
- They should be endless
- There should me Zombies Multiplayer eg 2 (players) or 3(players)
- There should be a mode where 2 teams Fight to win π also fight zombies (just same like multilayer only zombies added that attack both sides)
- Offline mode
5)New zombies characters and abilities
6)Day and Night Cycle during game (3 minutes day and 3 minutes night (Zombies only come at night many side effects to player at night time))