Add functions from other games and split into SP/MP/common

- Call of Duty
  - [ ] SP
  - [ ] MP
  - [ ] common
- Call of Duty: United Offensive
  - [ ] SP
  - [ ] MP
  - [ ] common
- Call of Duty 2
  - [ ] SP
  - [ ] MP
  - [ ] common
- Call of Duty 4
  - [ ] SP
  - [ ] MP
  - [ ] common
- Call of Duty: World at War
  - [ ] SP
  - [ ] MP
  - [ ] common
- Call of Duty Black Ops
  - [ ] SP
  - [ ] MP
  - [ ] common
