Half-Life / Half-Life 2

Bunnyhopping script:
alias bh1 "+jump;alias bh@ bh2;special"
alias bh2 "wait;alias bh@ bh3;special"
alias bh3 "-jump;alias bh@ bh4;special"
alias bh4 "wait;alias bh@ bh1;special"
alias +bhop "alias _special bh@;bh1"
alias -bhop "alias _special;-jump"
bind SPACE +bhop  

Constant-Duck script:
alias duck_tog duck_on
alias duck_on "+duck; alias duck_tog duck_off"
alias duck_off "-duck; alias duck_tog duck_on"
bind c duck_tog

Double-Duck script:
alias +dd "-duck;wait;+duck;wait;-duck;wait;+duck"
alias -dd -duck

Duckroll script:
alias +duckroll "alias _special duckroll;duckroll"
alias -duckroll "alias _special"
alias duckroll "+duck;wait;-duck;wait;special"

Gauss Boost script:
alias _taubo
alias _taubofunc "cl_pitchup 180;cl_pitchdown -180;
-attack2;wait;cl_pitchup -12;cl_pitchdown 12;wait;
cl_pitchup 89.999;cl_pitchdown 89.999"
alias +tau "+attack2;
alias _taubo _taubofunc"
alias -tau "_taubo; alias _taubo"

Jumpbug script:
alias _jumpbug
alias _jumpbugfunc "-duck;+jump;w5;-jump"
alias +jumpbug "+duck; alias _jumpbug _jumpbugfunc"
alias -jumpbug "_jumpbug; alias _jumpbug"  

Object Boosting script:
alias obbo2000 "+use;w11;-use;+jump;w;-jump"
alias obbo1500 "+use;w10;-use;+jump;w;-jump"
alias obbo1300 "+use;w9;-use;+jump;w;-jump"
alias obbo1000 "+use;w8;-use;+jump;w;-jump"
alias obbo800 "+use;w7;-use;+jump;w;-jump"
alias obbo600 "+use;w6;-use;+jump;w;-jump"
alias obbo500 "+use;w5;-use;+jump;w;-jump"

Quick-Use script:
alias quse "-use;wait;+use;wait;-use"

Usespam script:
alias +usespam "alias _special usespam;usespam"
alias -usespam "alias _special"
alias usespam "+use;wait;-use;wait;special"