This is not a complete list of mechanics, or what their functions are within the game, as some features are still being worked on. This post will be updated with changes and more in-depth descriptions when available.

Obelisk Mechanic
There are five obelisks, each containing three unique perks that can be acquired during the game (the perk you acquire from each obelisk will be randomly selected). Each player can only access a single obelisk once per game, which means you can obtain a maximum of 5 unique perks each time (although sometimes you might not get anything if the obelisk is displeased with your presence).

[Blue Obelisk - Serenity]
[Perk 1]
[Perk 2]
[Perk 3]

[Red Obelisk - Petulance]
[Perk 4]
[Perk 5]
[Perk 6]

[Yellow Obelisk - Wisdom]
[Perk 7]
[Perk 8]
[Perk 9]

[Purple Obelisk - Affliction]
[Perk 10]
[Perk 11]
[Perk 12]

[Green Obelisk - Life]
[Perk 13]
[Perk 14]
[Perk 15]

First Person Only
There is no 3rd person camera. Everything is 1st person.

PvPvE
There are creatures and other strange things that can potentially kill you. 

Day/Night Cycle
A full cycle takes 180 seconds.