The Hidden 2D is the first CS2D Mod with a changed SourceCode and new Gameplay. H2D is the 2D Version of the Half Life 2 Modification The Hidden: Source.
A player controls the invisible "Subject 617", called Hidden. The opposing I.R.I.S team (Infinitum Research Intercept Squad), a squad of eight men, have to defeat the Hidden or he survives a round of 5 minutes. If he survives he can play the Hidden in the next round and he earn adequate points. This Mod was made by TeD.
* 2 teams: IRIS and the Hidden.
* Team IRIS can have got 8 players and they have to defeat the Hidden.
* The Hidden is playing alone but he is invisible
* New radio Message for IRIS
* As Hidden you can observe the IRIS and speak sayings like "I see you..." or "You're NEXT", which the enemy can hear.
* The Hidden does not have any FOW (Fog of War) and is much faster.
* Incomprehensible sphere a'la FEAR as pure multiplayer game
* New sounds, graphics and weapons, as well as maps and new play modes
* KOGN Support
* and still much more