2 - Updated subspace - it was the level of competition and community that made that game amazing in the 90s.
3 - Civilization like civ 1 but updated with newer graphics/tech tree also the ability to be much more complex but only if you want to. Best part of the game imho was the exploration, simple but enjoyable tech tree and expansion. The new civ games are fun but take so much time to master and engage in.
4 - FPS that can be played in large scale format but doesn't reward 14 year old reflexes and levels the playing field for experience of older people.
Video games that are easily accessible, enjoyable and don't try and keep you on platform by wasting your time on meaningless accomplishments :D