Are there any 32 bit 3D game developing programs?

I've had some some ideas for 3D games but after installing unity I found out it's 64 bit. Can I somehow adapt it do 32 bit?

If not, could anyone suggest me 32 bit 3D game making software?

And if even that doesn't work, I guess I'm going to have to program 2d until I save enough for a PC...