XCOM: Chimera Squad
40 Achievements
60-80h
GOG
A New Look
Launch a mission with no human agents in the squad.
10.4%
How to unlock the A New Look achievement in XCOM: Chimera Squad - Definitive Guide
As it says on the box, hybrids are ok, just no humans. Put 4 aliens or hybrids on the APC and do a mission.