I have also included the notes of the original speedrunners. A full-game video is also available on the site. The final level has 2 videos: one showing a speedrun without out of bounds play and another with out of bounds play. I have included videos of each individual level. All thanks go to Drew "stx-Vile" DeVore and Laurent 'KlVis' Villard. They are not specifically for this achievement, but rather show methods of speedrunning the original game on Serious difficulty, which includes an incredible number of tricks that can save you hours of pain. This guide and the associated videos are not mine. Push B and under "statistics" it tells you, under "kills." (Example, Level 3 has 616 enemies on Serious). There are a SET NUMBER OF ENEMIES per level.
![serious sam 2 saves serious sam 2 saves](https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/3952782/90e5ebcc6076993902287c51b10d5a0e7856ac4a.jpg)
BUT if you found the secret minigun in level one, you have no reason to get it. In level three for example, there's a minigun in one of the areas. DONT fall for obvious traps, if you can help it.
![serious sam 2 saves serious sam 2 saves](https://media.vandal.net/m/2873/2005104173934_3.jpg)
SECRETS! Be careful with these, as the clever bastards at Croteam inserted "secrets" that often translate to "death trap." You could get a Cannon, or a giant Kamakazi blowing up in your face. Also, if you're like me and still don't like to save, turn on "Autosave" in the Game Options," so you don't lose progress. Save the Serious Bombs! You can hold a whopping 6 in Serious difficulty, and these should only be used in a failsafe or "OH SHIT OH SHIT OH SHIT" situation. This DOESNT affect your achievement, but it does affect my opinion of you and your gaming skills. You won't be as SERIOUS if you do it, but you can turn on "Unlimited Ammo" if you wish. This makes it less likely to run out of ammo at the most inoportune time. This means ammo pick ups give you double the ammo as well (100 MG bullets instead of 50, for example). You have double the ammo as in other difficulties (except Tourist). Enemies hit REALLY, REALLY hard (Kleers for example deal 50 points of damage), and there are more of them. Serious difficulty can be played at anytime, but be warned, its HARD. Are you serious? You must be if you are going for this achievement.