http://www.unrealsoftware.de/forum_posts.php?post=347949

-----------------------------------------------
---Lua Lag Compensation version 2.2 by FlooD---
-----------------------------------------------
--[[       latest version always at
raw.github.com/FloooD/C_lag_comp/master/llc.lua
---------------------------------------------]]

math.randomseed(os.time())

ping = {}
mode = {{}, {}, {}}
buf = {{}, {}}
disabled = {}
no_lc={}
for _, v in ipairs({0, 47, 48, 49, 51, 72, 73, 75, 76, 77, 86, 87, 88, 89, 253, 254, 255}) do
     disabled[v] = true
end

armor = {}
for i, v in ipairs({25, 50, 75, 50, 95}) do
     armor[200 + i] = 1 - (v / 100)
end

function lc_reset(id)
     mode[1][id] = 0
     mode[2][id] = 0
     mode[3][id] = 0
     buf[1][id] = {}
     buf[2][id] = {}
     ping[id] = nil
end
addhook("die", "lc_reset")

function lc_clear(id)
     lc_reset(id)
     no_lc[id] = false
end

for i = 1, 32 do
     lc_clear(i)
end
addhook("leave", "lc_clear")

function updateping(id)
     local actualping = player(id, "ping")
     if not actualping then return end
     local lastping = ping[id]
     if not lastping then lastping = 0 end
     if actualping - lastping <= 30 or lastping == 0 then
          ping[id] = actualping
     else
          ping[id] = 0.7 * lastping + 0.3 * actualping
     end
end
addhook("spawn", "updateping")

function lc_second()
     for i in pairs(ping) do
          updateping(i)
     end
end
addhook("second", "lc_second")

MAX_FRAMES = 15
function updatebuf()
     for i in pairs(ping) do
          for j = MAX_FRAMES, 1, -1 do
               buf[1][i][j], buf[2][i][j] = buf[1][i][j-1], buf[2][i][j-1]
          end
          buf[1][i][0], buf[2][i][0] = player(i, "x"), player(i, "y")
     end
end
addhook("always", "updatebuf")

addhook("hit", "lc_hit", 1000)
function lc_hit(v, id, wpn)
     return (disabled[wpn] or id == 0 or no_lc[id]) and 0 or 1
end

addhook("attack", "lc_attack")
function lc_attack(id)
     local wpn = player(id, "weapon")
     if disabled[wpn] or no_lc[id] then return end
     local rot = player(id, "rot")
     local dmg = itemtype(wpn, "dmg") * game("mp_damagefactor")
     if (wpn == 2 and mode[1][id] == 1) or (wpn == 39 and mode[2][id] == 1) then
          dmg = math.floor(dmg * 0.64 + 0.5)
          simulate_attack(id, wpn, dmg, rot - 6 + 12 * math.random())
          simulate_attack(id, wpn, dmg, rot + 6 + 8 * math.random())
          simulate_attack(id, wpn, dmg, rot - 6 - 8 * math.random())
          return
     elseif wpn == 10 or wpn == 11 then
          for i = 1, 5 do
               simulate_attack(id, wpn, dmg, rot - 20 + 40 * math.random())
          end
          return
     end
     if mode[3][id] == 1 then
          dmg = itemtype(wpn, "dmg_z1") * game("mp_damagefactor")
     elseif mode[3][id] == 2 then
          dmg = itemtype(wpn, "dmg_z2") * game("mp_damagefactor")
     end
     rot = rot + itemtype(wpn, "dispersion") * (2 * math.random() - 1)
     simulate_attack(id, wpn, dmg, rot)
end

addhook("attack2", "lc_attack2")
function lc_attack2(id, m)
     local wpn = player(id, "weapon")
     if wpn == 50 or wpn == 69 then
          if no_lc[id] then return end
          simulate_attack(id, wpn, itemtype(wpn, "dmg_z1") * game("mp_damagefactor"))
     elseif wpn == 2 then
          mode[1][id] = m
     elseif wpn == 39 then
          mode[2][id] = m
     elseif wpn ~= 32 and wpn >= 31 and wpn <= 37 then
          mode[3][id] = m
     end
end

addhook("reload", "unzoom")
addhook("select", "unzoom")
function unzoom(id)
     mode[3][id] = 0
end

addhook("drop", "lc_drop")
function lc_drop(id, iid, wpn)
     mode[3][id] = 0
     if wpn == 2 then
          mode[1][id] = 0
     elseif wpn == 39 then
          mode[2][id] = 0
     end
end

addhook("collect", "lc_collect")
function lc_collect(id, iid, wpn, ain, a, m)
     if wpn == 2 then
          mode[1][id] = m
     elseif wpn == 39 then
          mode[2][id] = m
     end
end

function simulate_attack(id, wpn, dmg, rot)
     if not wpn then wpn = player(id, "weapon") end
     if not dmg then dmg = itemtype(wpn, "dmg") * game("mp_damagefactor") end
     if not rot then rot = player(id, "rot") end
     local range = itemtype(wpn, "range")
     local start_x = player(id, "x")
     local start_y = player(id, "y")
     local end_x = (3 * range) * math.sin(math.rad(rot))
     local end_y = -(3 * range) * math.cos(math.rad(rot))
     local tile_x = math.floor(start_x / 32)
     local tile_y = math.floor(start_y / 32)
     local inc_x, inc_y
     if rot < 0 then
          inc_x = -1
     elseif rot > 0 and rot ~= 180 then
          inc_x = 1
     end
     if math.abs(rot) > 90 then
          inc_y = 1
     elseif math.abs(rot) < 90 then
          inc_y = -1
     end
     while not tile(tile_x, tile_y, "wall") do
          local temp_x, temp_y = tile_x, tile_y
          if inc_x and intersect(end_x, end_y, topixel(temp_x + inc_x) - start_x, topixel(temp_y) - start_y, 16) then
               tile_x = temp_x + inc_x
          end
          if inc_y and intersect(end_x, end_y, topixel(temp_x) - start_x, topixel(temp_y + inc_y) - start_y, 16) then
               tile_y = temp_y + inc_y
          end
          if tile_x == temp_x and tile_y == temp_y then
               break
          end
     end
     if tile(tile_x, tile_y, "wall") then
          end_x, end_y = intersect(end_x, end_y, topixel(tile_x) - start_x, topixel(tile_y) - start_y, 16)
     end
     local frames = math.floor(0.5 + ping[id] / 20)
     if frames > MAX_FRAMES then frames = MAX_FRAMES end
     local victims = {}
     if game("sv_friendlyfire") == "0" and game("sv_gamemode") ~= "1" then
          for i in pairs(ping) do
               if player(i, "team") ~= player(id, "team") then
                    victims[i] = true
               end
          end
     else
          for i in pairs(ping) do
               victims[i] = true
          end
          victims[id] = nil
     end
     for i in pairs(victims) do
          if intersect(end_x, end_y, buf[1][i][frames] - start_x, buf[2][i][frames] - start_y, 12) then
               parse("sv_sound2 "..id.." player/hit"..math.ceil(3 * math.random())..".wav")
               parse("sv_sound2 "..i.." player/hit"..math.ceil(3 * math.random())..".wav")
               local newhealth
               local newarmor = player(i, "armor")
               if newarmor <= 200 then
                    newarmor = newarmor - dmg
                    if newarmor < 0 then
                         newarmor = 0
                    end
                    newhealth = player(i, "health") - (dmg - math.floor(game("mp_kevlar") * (player(i, "armor") - newarmor)))
                    parse("setarmor "..i.." "..newarmor)
               else
                    newhealth = player(i, "health") - math.floor((dmg * (armor[newarmor] or 1)))
               end
               if newhealth > 0 then
                    parse("sethealth "..i.." "..newhealth)
               else
                    sample.ut.kill(id,i,wpn) --id=killer, i=victim

                    parse("customkill "..id.." \""..itemtype(wpn, "name").."\" "..i)
               end
          end
     end
end

function topixel(tile)
     return (tile * 32) + 16
end

function intersect(ex, ey, bx, by, bl)
     if not (bx and by) then return end
     local cx, cy = (math.abs(bx) <= bl), (math.abs(by) <= bl)
     if cx and cy then
          if math.abs(ex - bx) <= bl and math.abs(ey - by) <= bl then
               return ex, ey
          end
          bl = -bl
     end
     local ox = (ex >= 0) and bx - bl or bx + bl
     local oy = (ey >= 0) and by - bl or by + bl
     local flip
     if (ex == 0 or (cx ~= cy or ((math.abs(ey * ox) >= math.abs(ex * oy)) == (bl < 0)))) and ((not cy) or cx) then
          if ey == 0 then return end
          ex, ey, bx, by, ox, oy = ey, ex, by, bx, oy, ox
          flip = true
     end
     if (ox * ex) >= 0 and math.abs(ox) <= math.abs(ex) then
          oy = ox * ey / ex
          if math.abs(oy - by) <= math.abs(bl) then
               if flip then return oy, ox end
               return ox, oy
          end
     end
end

addhook("serveraction", "lc_serveraction")
function lc_serveraction(id, action)
     if action == 1 then
          msg2(id, "Lua Lag Compensation 2.2")
          msg2(id, "Your current ping: "..player(id, "ping"))
          msg2(id, "Current LC is "..(no_lc[id] and "off" or "on").." for yourself.")
     elseif action == 2 then
          no_lc[id] = not no_lc[id]
          msg2(id, "LC toggled "..(no_lc[id] and "off" or "on").." for yourself.")
          msg2(id, "Press the same button to toggle again.")
     end
end

--------------------------------------------------
-- UT+Quake Sounds Script by Unreal Software    --
-- 22.02.2009 - www.UnrealSoftware.de           --
-- Adds UT and Quake Sounds to your Server      --
--------------------------------------------------

if sample==nil then sample={} end
sample.ut={}

-----------------------
-- INITIAL SETUP     --
-----------------------
function initArray(m) --btw, can be a local function
     local array = {}
     for i = 1, m do
          array[i]=0
     end
     return array
end
sample.ut.timer=initArray(32)                    -- time of last kill, for each player
sample.ut.level=initArray(32)                    -- current kill level (killstreak), for each player
sample.ut.fblood=0                                   -- first blood already shed? 0=no/1=yes

-----------------------
-- KILL SOUNDS+MSGS  --
-----------------------
--THE HOOK HAS TO BE REMOVED, cuz the function is called from line 218
function sample.ut.kill(killer,victim,weapon)
     sample.ut.level[victim]=0
     level=sample.ut.level[killer]
     level=level+1
     sample.ut.level[killer]=level
     -- HUMILIATION? (KNIFEKILL)
     if (weapon==50) then
          -- HUMILIATION!
          parse("sv_sound \"e5/Ninja.wav\"");
          msg (player(killer,"name").." ©000000255 NINJA style!!@C")
     else
          if (level==4) then
               parse("sv_sound \"e5/ultrakill.wav\"")
               msg (player(killer,"name").." ©000000255made an ULTRAKILL!@C")
          elseif (level==5) then
               parse("sv_sound \"e5/dominating.wav\"")
               msg (player(killer,"name").." ©000000255is DOMINATING the other team!@C")
          elseif (level==10) then
               parse("sv_sound \"e5/headhunter.wav\"")
               msg (player(killer,"name").." ©000000255killed 10 in a row!!@C")
          elseif (level==20) then
               parse("sv_sound \"e5/megakill.wav\"")
               msg (player(killer,"name").." ©000000255continues his streak with 20 kills in a row!!@C")
          elseif (level==50) then
               parse("sv_sound \"e5/ownage.wav\"")
               msg (player(killer,"name").." ©000000255just can't die... 50 kill streak!!!@C")
          elseif (level==100) then
               parse("sv_sound \"e5/unstoppable.wav\"")
               msg (player(killer,"name").." ©000000255100 kills in a row... UNSTOPPABLE!@C")
          elseif (level==200) then
               parse("sv_sound \"e5/godlike.wav\"")
               msg (player(killer,"name").." ©0002555000has demonstrated legendary skill with 200 killing streak!@C")
          end
     end
end