Each minigame has it's own coins, quests and lobby. Coins are usually spent in shop for useful or just cosmetic upgrades, quests are helping you with progress to reach better items and in each lobby you can find thing like parkour, Mystery Box or Delivery Man.
This is a list of all the available minigames on the network right now.They are put in categories here (these categories are from the Game Menu). You can also read about the main lobby and more down below.
There are currently 4 shooter minigames:
Survival is categorized to 3 more catogeries.
There are currently 3 normal survival minigames:
There are currently 3 team survival minigames:
There is currently only 1 hardcore survival minigame:
There are currently 2 casual lobbies, full of minigames:
There are currently 4 competitive games:
There is currently only 1 racing minigame:
Adventure maps are Hypixel's 1st creations. From Wrath of the Fallen to Herobrine's Return, all of these maps are still one of the best adventure maps ever. Unfortunately right now, the lobby is removed and if it will be added back in the future is unknown.
Housing is a place where you get a little place to show your creative skills. Crucial feature for this minigame are blocks from Mystery Boxes and various upgrades for your plot like bigger size or various themes, everything for Hypixel Credits.
Every lobby has it's own parkour race. Usually it's next to portal on the right side when you look at it. Try them and try to beat your friends or share your time on Hypixel forums!