Here you will find a list of the special events that have happened so far, so that you know what to potentially expect for future events :P
Halloween Events[]
2018 Halloween Event[]
Halloween Candy which gave temporary buffs were temporarily loot-able, here's what they looked like:
File:Halloween Candy.png
2019 Halloween Event[]
Halloween themed Special Infected were temporarily added to the game which gave about 1,000 base exp per kill, which added with the event EXP Bonus and the player's EXP Bonus, most players were getting roughly 2,500 exp per kill.
2020 Halloween Event[]
The 2020 Halloween event "Halloween Howling" featured a new Time Limited Cosmetic; the Lycan Mask, and special Lycan Infected that grant large amounts of EXP.
2023 - Symphony of Slaughter[]
More information here: Symphony of Slaughter.
Christmas Events[]
2018 Christmas Event[]
Christmas Candy which gave temporary buffs were temporarily loot-able, here's what they looked like:
2019 Second Christmas Event[]
Christmas themed Special Infected were temporarily added to the game which gave about 1,000 base exp per kill, which added with the event EXP Bonus and the player's EXP Bonus, most players were getting roughly 2,400 exp per kill.
2020 Christmas Event[]
A new boss was introduced with this event, The Wendigo, which was an extremely powerful boss and vanished when the christmas event was over.
Egg Nog was also a new item that was lootable:
Which also gave a weaker version of Christmas High this time:
The Special Infected Santa Hats were also back to be hunted down for a large amount of EXP.
Easter Events[]
2020 Easter Holiday Event[]
This was the 1st Easter Event:
The Bunny Mask was added as a Limited-Time cosmetic for the length of the event costing 200 Credits.
Easter themed Special Infected were temporarily added to the game which gave about 1,000 base experience per kill depending on the zone. These Infected also wore the Bunny Mask mentioned above.
2021 Easter Holiday Event[]
This was the 2nd Easter Event:
While the Bunny Mask did not make a return, A Discord server event did occur. This started on the first day of the event. Adminpwn would create clues for the denizens of Fairview city to decipher and discover Silver easter eggs, which the first person to find it being awarded with 1000 Credits. Following this, if a player was able to collect 8 of these Silver easter eggs, the player would then be able to talk to the trainer at an outpost, for $10,000, and craft a unique, untradable helmet known as the Crusader's Helmet;
Players could also, for 2 Silver easter eggs, and $2,500, could craft an elite enhancer.
Anniversary Events[]
1st Anniversary Event (2019)[]
On the 5th of September 2019, DF2 had its 1st Anniversary which was celebrated with a special event:
>Note: It was actually 50% Exp Gain and not 25% like the announcement shows.
2nd Anniversary Event (2020)[]
On the 5th of September 2020, DF2's 2nd Anniversary happened, which included the event shown below:
Note: Lasted until the 9th.
5th Anniversary Event (2023)[]
During 5-19 September 2023 players could access Autumun's Haven.
Summer Event & Sale[]
The summer event was a special event that lasted from 07/31/2020 to 08/9/2020. The event details are shown in the discord image below:
July 4th Weekend Event[]
To celebrate July the 4th, there was a special +100% EXP gain event for the weekend.
One-Off Events[]
Covid-19 Event[]
The Covid-19 event started on 03/25/2020 and lasted until 06/15/2020.