Great points. Also you can dip in and out of Doom quite easily - the original’s three episodes (or five if you include Thy Flesh Consumed and Sigil) can each be

Great points. Also you can dip in and out of Doom quite easily - the original’s three episodes (or five if you include Thy Flesh Consumed and Sigil) can each be comfortably finished within an hour so starting a new game isn’t necessarily a huge investment of time. You also mention System Shock 2 - which is arguably better enjoyed second or third time round.