In my mod for DOOM, namely Project Overkill, hides a few secrets in the weapon DOOM 4 Plasma Pistol. However, it would take a person a mind of dedication and also a motivation of curiosity to find the weapon's ultimate function.
Link: Youtu.be
In Generals Mod 3.0, I would do the same. Inside the mod, there are units labelled "OverPowered" being secretly placed into each and every faction. OverPowered Units or Structures, shortened as OP units, are the enhanced version (or I would say, turnt up to death version) of (usually) several of the existing units or structures on each country. These units cost more, deal more damage, and have very intimidating position to their opponents.
To unlock them, one must have a specific prerequisite. These prerequisites are unique for each country, and these prerequisite by no means are sequential or predictable, and some may need to acquire "other" intel.
If one manage to unlock these OP units, on their cameos will have a label to differentiate them from normal units. And one must take the chance to build them quickly, as these units take more time to build as well the prerequisites were specific. If one prerequisite is lost, then one's time is wasted and they are require to take time rebuild.
