I'm on Observation Duty games in order

All 5 games of the I'm on Observation Duty series in the order they came out, from I'm on Observation Duty (2018) to I'm on Observation Duty 5 (2022).

1. 
   I'm on Observation DutyPC, iOS, Android +2 · Notovia
   14 Dec
2. 
   I'm on Observation Duty 2: Timothy's RevengePC, Linux, Mac · Notovia
   23 Mar
3. 
   I'm on Observation Duty 3PC, SteamVR, Mac +1 · Notovia
   13 Nov
4. 
   I'm on Observation Duty 4PC, Mac, Linux · Notovia
   22 Dec
5. 
   I'm on Observation Duty 5PC, Mac, Linux · Notovia
   13 May