Keep in mind that the description of what each command does has not been verfied, and may be incorrect. This list was compiled at midnight:

dec_roundtime, "600" -- how long a match is.
dec_runspeed, "310" -- How fast running it
dec_startmoney_civilian, "200" -- Gained money when starting as an agent.
dec_startmoney_agent, "350" -- Gained money when starting as an agent.
dec_startmoney_vip, "500" -- Gained money when starting as VIP
dec_income_civ_time, "2" -- How much money gained in seconds with full karma as civilian
dec_income_civ_amount, "1" -- How much money gained per karma second
dec_income_agent_time, "1" -- How much money gained in seconds with full karma as an agent
dec_income_agent_amount, "1" -- How much money gained per karma second
dec_income_vip_time, "1" -- How much money gained in seconds with full karma as VIP
dec_income_vip_amount, "2" -- How much money gained per karma second as VIP
dec_rounds, "7" -- How many rounds there are.
dec_healthregen_percentage, "0.25" -- How much will be gained back.
dec_healthregen_enabled, "1" -- Health regen system.
dec_healthregen_dmgpenalty, "15" -- How much health will not be gained back.
dec_healthregen_regentime, "2" -- How long it takes to regenerate.
dec_stamina_drain_sprint_time, "0.6" -- How much stamina is drained while sprinting per second.
dec_stamina_drain_sprint_amount, "1" -- How much stamina is drained while sprinting per 0.6 seconds.
dec_stamina_drain_jump, "5" -- How much stamina is drained per jump.
dec_stamina_drain_ledgepull, "10" -- How high the pull is when climbing ledge
dec_stamina_drain_ledgehang_time, "1" -- Stamina drain while underwater
dec_stamina_drain_ledgehang_amount, "1" -- How many ledges you can hang off of at once.
dec_stamina_drain_underwater_time, "0.3" -- Stamina drain while underwater
dec_stamina_drain_underwater_amount, "1" -- Stamina drain while underwater
dec_stamina_regen_time, "0.2" -- How long it takes to regernerates.
dec_stamina_regen_amount, "1" -- How fast stamina regenerates.
dec_pickup_weight, "30" -- weight of dead bodies.
dec_pickup_enabled, "1" -- Pick up dead bodies.
dec_propdamage, "0" -- Prop Damage
dec_chat_distance, "256" -- Length of chat distance before drop off
dec_mic_distance, "256" -- Length of mic distance before drop off
dec_max_armedkills, "4" -- Unsure what this command does?
dec_bandur, "60" -- Unsure what this command does?
dec_noreturnfirekarmaloss, "0" -- If set to one then armed civilans that don't shoot back will result in karma loss
dec_karmalossmaxdamage, "175" -- Max damage for karma loss per round.
dec_confirm_agent, "100" -- Bonus for confirming the death of the enemy agent
dec_confirm_vip, "200" -- Bonus for confirming the death of the VIP
dec_analysis_increase, "34" -- Percent increase per ney body found
dec_analysis_initial, "33" -- Percent chance of scanning a corpse to fingerprints of others.
dec_maxweapons, "2" -- Max weapons to carry at a time.
dec_maxweapons_unique, "2" -- Max unique weapons to carry.
dec_roundrestart -- Restarts the round

If any errors are found in this list then it will be corrected, any missing commands will be added. If any of these commands are broken, then let us know