Quests are in-game achievements in Goat Simulator awarded for doing tricks or completing special objectives. They can be viewed by pressing Esc. One quest can be displayed on the HUD at a time.
Some quests overlap with Steam achievements, but not all.
Goat MMO Simulator quests are presented in the style of an MMO game. You must talk to specific NPCs to initiate quests, and some quests have multiple segments or give a item on completion. For a list of quests from Goat MMO Simulator, see MMO Quests.
There are 2 kinds of quests in GoatZ. There are normal ones, which you can complete whenever you want, and after outbreak only quests. One of these will be randomly chosen and the timer will start. If the player completes the quest before the time is up, they will recieve health and/or food. For a list of quests from GoatZ, see GoatZ Quests