Here is the full list of all 66 CS2D achievements.
Kill 50 humans with your zombie claws!
Kill 10 enemies with the Swiss SIG SG 552
Create and save a playable map in the map editor
Plant C4 100 times in standard mode
Kill 666 zombies (zombie game mode)!
Throw a flare in a game with fog of war enabled
Buy weapons and equipment worth 1,000,000$!
Spend 1,000,000$ for buildings! (upgrades and repairs excluded)
Fortify your area with 50 Level III walls!
Build 50 barricades!
Build 50 barbed wire!
Dominate 10 flag points (DOM maps)!
Get 5000 kill assists (bots excluded)
Kill 5000 enemies (bots excluded)
Get 1000 kill assists (bots excluded)
Get 500 kill assists (bots excluded)
Kill 1000 enemies (bots excluded)
Kill 10 enemies with the Scout
Kill 10 enemies with the Belgian FN P90
Get 100 kill assists (bots excluded)
Kill 10 enemies with the US Ingram Armament MAC-10
Kill 10 enemies with the HK G3 SG 1 sniper rifle
Kill 10 enemies with a bague... err... with the French FAMAS!
Kill 500 enemies (bots excluded)
Kill 10 enemies with the AWP
Kill 10 enemies with the Steyr AUG
Kill 10 enemies with the Israeli IMI Galil
Capture and return the enemy flag on a CTF map!
Kill 10 enemies with H&K's Maschinenpistole 5 aka MP5
Kill 10 enemies with the HE grenade
Get 50 kill assists (bots excluded)
No money? Kill 50 enemies with the Glock!
Kill 25 enemies with the Desert Eagle
Kill 10 enemies with the M3
No money? Kill 50 enemies with the USP!
Kill 10 enemies with the TMP
Kill 30 enemies with the M4A1
Kill someone with the M249 machine gun (bots excluded)
Get 10 kill assists (bots excluded)
Kill 30 enemies with the AK-47
Kill 100 enemies (bots excluded)
Kill an enemy with a sniper rifle and 2x scope (bots excluded)
Kill 10 enemies with the Swiss SIG SG 550
Kill 50 enemies (bots excluded)
Kill 5000 bots
Kill 1000 bots
Kill 500 bots
Throw a flash bang!
Kill 100 bots
Kill 50 bots
Kill 10 bots
Kill someone with the rocket launcher (bots excluded)
Kill the VIP in a standard mode multiplayer game (6+ players)
Make it to the escape zone alive as VIP in a standard mode multiplayer game (6+ players)
Humiliate 10 real enemies by killing them with your knife in multiplayer mode (6+ players)
Humiliate a real enemy by killing them with your knife in multiplayer mode (6+ players)
Rescue 25 hostages in standard mode multiplayer games (6+ players)
Rescue a hostage in standard mode multiplayer games (6+ players)
Defuse C4 in a standard mode multiplayer game (6+ players)
Finish to defuse C4 last second before it explodes (in standard mode with 6+ players)
Plant C4 and let it explode in a standard mode multiplayer game (6+ players)
Kill 10 enemies (bots excluded)
Spray a spray logo!
Say "rank" to get your rank on a server
Kill 4 players in one round, each with a different laser color (bots excluded, 6+ players)
Be the first one who kills an enemy in a round (6+ players multiplayer only)