This is not final in any way, but will give an idea of what the game is like so far. I have already started to improve things since this build. - Note that there will be some minor errors that pop up due to Unity's NavMesh and how it operates, but just close it when it does.
Just extract the RAR file and open CARNAL.exe inside the folder. It is a 64-bit version.
WASD - Movement
Mouse LB - Shoot
Mouse RB - Grenade (from rocket ammo)
Space and C - Jump and Swim down