- One sumbition - one map. If your map has become too big, you can divide it into multiple maps. If your map has a sequence where players could potentially die a lot of times, we strongly advice you to make this sequence as a standalone map. You can also make a map-pack in case you need to optimise your project; other than that, map-packs are not allowed;
- Your map must be packed in a .gro-archive and launch correctly on a clean installation of Serious Sam. Don't use non-latin letters and spaces in the filenames. You can use
AutoGRO to make a correct package;
- Singleplayer mode only! If you want to make a DM/coop/survival map — do it after you finish the singleplayer version;
- You're allowed to use SDK and extra DLLs in your map. Workshop entries are allowed as well, but you must attach a ReadMe file containing the list of all the links the player has to subscribe to. You can use any resources from other maps/mods, but make sure that you have a permission from the respective authors.
- Keep your development progress a secret. There are no potential strikes regarding thieves in case your unique idea will be leaked and used by some other contestant;
- You can have testers, composers, writers and other people to help you out (under your own responsibility);
- Your map must have a beginning and an ending. Make sure there are no critical and game breaking bugs. If the contest judges will have to use cheats in order to finish your map, it will result in loosing winning points for you;
- DO NOT TRY to make you map longer by making large and meaningless walking sections;
- The contest organizers are free to withdraw/remove a particular contestant from the competition due to systematic rule violations on this or previous contest (or if this particular contestant has been banned);
- The contest organizers can change some contest rules in any time and period up until its ending;
Classic 
Egypt 
Sirius 
