On to completing the game!
Phase 1:
Go ahead and launch the game. Press ESC and press the option for "RED TIE". This will get you can achievement.
Then, drag the "Camera Speed" slider all the way to the right, and turn on Auto Rotate. you will get another achievement.
And.... That's it for phase 1!
Phase 2 & 3:
I'll leave this note at the beginning since it's important. You want to check the Steam forums for Tree Simulator every so often to see if there's a public event being planned. You CANNOT do this on your own, and you will need 99 other people willing to join the game simultaneously. Therefore, you will need to wait for there to be a public event. It should be pretty obvious if there is one on the Steam forums. It's important to take advantage of it as soon as you can, it only happens a couple times a year, and there may be a limited number of times left, as less people become interested in the game. There are no public lobbies. The only way to play multiplayer is to either join someone or have people join you.
Once you're present in a game with 99 other trees, (100 total) you'll get all of these achievements.
With that done, or while waiting for that to occur, our only goal is to idle for 10,000 hours total. This is a MASSIVE amount of time. (420 days) so get ready for a long haul. You can still use your PC while idling, but the game will always be in Fullscreen mode. There's no way to circumvent this without manipulating game files. This is probably the longest idle achievement on Steam. It's also worth mentioning that you can play the game on a different PC and your time will pick up where it left off.
First of all, there's an RNG achievement that you're guaranteed to get by the time you're done. There will be a time where some UFO's show up. When that happens, (at a random time) you will get this achievement.
Now, it's just pure time. Let the time advance and profit!
After five minutes, you will receive this achievement.
Review treeBe a tree for 5 minutes, you can now review being a tree.
After 1 hour, you will receive this achievement.
After 2 hours, you will receive this achievement.
Aspen treeThis is not a joke to you, you are the tree.
After 5 hours, you will receive this achievement.
After 10 hours, you will receive this achievement.
Now, you have longer stretches in between achievements. After 500 hours, (20.8 days) you will receive this achievement
After 1,000 hours, (41.7 days) you will receive this achievement
Unstoppable treeSome say the tree is not mightier than the storm, but the tree is the storm.
After, 2,000 hours, (83.3 days) you will receive this achievement
Legend treeHumans speculate on your age, they try to study you but you give them splinters and they die.
After 5,000 hours, (208.3 days) you will receive this achievement
Outside treeYou can now go outside and t-pose in public as a tree repeating the phrase "Tree" over and over.
After 10,000 (!!!) hours, (416.7 days) you will receive this achievement
Bro treeDo you even tree bro? You have bragging rights, other trees cannot compete.
And will have completed the game! Congrats! You can now give your computer(s) a break.
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