For your information, CSGO has been updating and many maps are not longer compatible with the achievements. In total, CSGO has over 167 achievements on steam. Out of which 6 achievements require older maps to run. Hence, this guide will provide an overview on how to collect all these 6 achievements. And throughout this guide I'll link the workshop map for your convenience.

Workshop id: 1193875520
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1193875520

Workshop id: 416884493
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=416884493

Workshop id: 1193879022
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1193879022

Workshop id: 884196682
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=884196682
These workshop ids are crucial bits to keep in mind for the next step.

Have you ever try shooting all the windows in the office and thought to yourself. why am I not receiving 'A World of Pane' achievement?

Workshop id: 1301364536
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1301364536&searchtext=office+competabile
With this office map, you won't have to worry

Note: Make sure to complete this step as it is the crucial section to follow, without this, the achievements won't work and it'll be redundant unless you just want to enjoy the nostalgic/old map pool.

Now, in order to play this map under official CSGO map pool, you need to access your steam folder. To do that follow this:
Access your CSGO folder steam > steamapps > common > Counter- Strike Global Offensive > csgo > maps > workshop

Search or locate the workshop folder by input the workshop id "1301364536" then click on it

Copy the map.bsp from the "1301364536" workshop folder

Paste the map.bsp to the map folder

Hooray, you can now launch your CSGO and enjoy the map and your achievement

Well done! Here are some handy commands to use to complete the challenge faster

Quick play a map with using command:
map cs_office

As the command suggest:
"mp_warmup_end"

Win the map without playing a round:
"mp_roundtime_defuse 0.025; mp_roundtime_hostage 0.025; mp_freezetime 0; mp_maxrounds 1000; mp_round_restart_delay 0; mp_restartgame 1".

Have a nice day,
Peppermint 🍬
(signing off)