ARK, I believe, needs friends, otherwise I would have found it extremley boring

CIV 5 needs friends after you have beaten the AI a few times. Nothing better than trash talking a mate as you charge their capital

TF2 is a game that offers custom maps, perfect for playing with friends

The Division is good with friends if you are all at the same level, and are progressing together.

Garry's Mod can be great with friends, if one of you know's what you are doing

H1Z1 is fantastic with friends and without them, can make a person very angry

CSGO is great with friends. Bad with randoms, but sometimes you can make new friends

Planet Coaster cannot be played with friends.