Also, pretty sure it was a small indie team rather than a “big developer”
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0: https://cityofnone.com/And any new stuff regarding Celeste or from their devs will forever be relevant to me! Highly recommend to any who haven't played it.
If I remember correctly it was a team of 2.
0: https://maddymakesgames.com/
Fans of Celeste will almost certainly enjoy the local multiplayer game Towerfall by the same developers.