DOOM 64
10 Achievements
1,000
1-2h
That was Fun
Finish a 'Fun' Level
100
5.42%
How to unlock the That was Fun achievement in DOOM 64 - Definitive Guide
Credit to DonTobago use this code to make this easier! XR1M 7HVM BCRZ YJVB
Here is a video of the level and how to beat it.
It would be more easy!
All weapons
Kill the cyberdemon
Type in: ?QDM 7HYC BB4X FJVB
This loads you on level 1 on the easiest difficulty with full ammo and weapons.
Now pause the game and you'll see a new option called Features that isn't available normally.
This allows you to select any level to play.
The fun levels are:
MAP25: Cat And Mouse
MAP26: Hardcore
MAP27: Playground
Choose any of those and complete the level for the achievement.
I did Cat and Mouse and save scummed it. Go back and right and follow the patt around until a door on the right. Go in and pick up the rocket launcher and all the rockets. Now it's just a case of getting some clean hits on the Cyberdemon and hiding and saving.
Only warp to the level. Don't use any other cheats as they disable the achievement.
Fun Level - 11:30
Achievement Walkthrough - Quick/Easy Method:
From the main menu, select 'Options' then 'Password'. Type in ?QDM 7HYC BB4X FJVB. You will spawn on 'MAP01: Staging Area' on 'Be Gentle' difficulty with 200 Health, 200 Armor, all weapons and full ammo.
By using the password, when you pause the game, there will be a new option called 'Features'. Select it and this will open up a menu that will allow you to warp to any level, as well as change other aspects of the game. IMPORTANT: Do not change any of the settings besides 'Warp to Level'. If you do, you will disable the achievement.
There are four Fun levels to choose from: 'Cat and Mouse' 'Hardcore', 'Playground' and 'Panic'. Press or until it says 'Warp to Fun', select the desired map then press to start the level.
In these small levels, you face tough enemies, such as the Cyberdemon, Arachnotrons and Mancubi. 'Cat and Mouse' is probably the 'easiest' of these levels as you only face the Cyberdemon, but you still need to be careful as the corridors are tight and the Cyberdemon teleports. Complete any one of these levels to unlock the achievement.
Note that if you have not unlocked "Rip and Tear!" already, you will do so during this level.
Thanks to Larzuk06 for the video for 'Cat and Mouse', 'Hardcore' and 'Playground':
Thanks to pagb666 for the video for 'Panic':
The 'Fun' levels in the game are Levels 25, 26 and 27, finish any of these on any difficulty and this trophy will unlock. Use password "XR1M 7HVM BCRZ YJVB" to start on level 27 'Playground' with all weapons, full ammo and on easiest difficulty. This is the quickest and easiest of the 3 'fun' levels. Destroy all enemies in the level to complete it and unlock this trophy. If you are doing a legit playthrough then on completion of level 25 'Cat and Mouse' you will unlock this trophy.
Below is a video showing a playthrough of level 27 'Playground':
Level names:
Cat And Mouse
Hardcore
Playground
I went through Hardcore, it seemed easier to me. Also in this level you can get a trophy for killing a cyberdemon.
I did not check this information, since I knocked out the trophy in the standard way, but there are passwords for each of these levels that allow you to start the game immediately from it, without going through Hectic. Anyone who wants can try
Passwords for starting with easy difficulty (Passwords are entered in the options menu in the main menu):
Cat And Mouse: QY88 9BF6 6?DM 2BK?
Hardcore: RF68 9BF2 6?GM TBK?
Playground: RY48 9BFY 6?JM KBK?