It is famously used for classic modpacks, including early iterations of IndustrialCraft 2 BuildCraft RedPower 2 Twilight Forest Authentic Feel:
Villages are pointless. They have no trades. Iron Golems spawn, but you have no reason to protect villagers. The world feels incredibly lonely compared to 1.20+, where every biome has a unique structure or mob. minecraft 1.2.5 java version
Mojang (now Microsoft) does not make old versions easy to find via the default launcher, but they are legally accessible. Here is the definitive way to play 1.2.5 today. It is famously used for classic modpacks, including
You cannot upload a 1.2.5 world to Realms (it will fail conversion). However, you can convert a 1.2.5 world up to modern versions via incremental upgrades (1.2.5 -> 1.6.4 -> 1.12.2 -> 1.20+), but terrain generation will cause harsh chunk borders. The world feels incredibly lonely compared to 1
Wild ocelots were fixed to stop behaving like tamed cats, and cats themselves were made less eager to sit on every available surface.