Here are some of the cosole commands that can change the physiques in the Half-life world:
Replace x with numbers: 0 = No gravity, 800 = Default, -800 = Reversed gravity.
Note: It's gravity the way you want it
Replace x with numbers: Changing the numbers higher than 10 won't affect your speed. But try to put in negative numbers like -200 and your speed will certainly be affected but it will also revers your controller so up means down etc.
Note: Revers your controller before using the accelerating code and there will be no reversed controll.
Replace x with numbers: 0 = Default, 0.2 - 100 = Faster and faster gameplay, 0.02 and down to 0.001 = True matrix style (ultra slow).
Note: Combine -host framerate 0.002 with -sv_accelerate 20000 and the game will play really slow but you'll be so quick that you're almost invisible. With this speed you can even outrun a crossbow dart.
Replace x with numbers: 4 = Default, 1 = Slippery, 0 = To slippery to stop,
-4 = So slippery that you'll go faster and faster.
Note: The name says it all.
Replace x blah, blah: 18 = Default
Note: the higher the number, the higher you can walk over. Type in 18000 and you can walk straight up any building. Type in 0 and you can't even go up a stair.
Added by: Creepglitch Sep 30th 2006, ID#9666