FreeRunner is a TC of Duke3D using the Build engine with the completely new features that Eduke32 port offers (Directx, great scripting, etc).
So far It's me DavoX (Buenos Aires explosive, CBP7), Geoffrey Van dijk (Fbsp001, 002,003, Night and Day, Project advent, and a long etcetera) as mappers and DeeperThought (DNWMD, Mario Nukem, Duke Nukem Arena, Duke Ex) as a coder and we need more mappers!!
The gameplay consists on a "Prince of persia"ish type of game, jumping around, doing wall jumps, dodges, mantling on ledges, moving crates to reach high places, etc,etc.
Maps don't need to be extremely detailed or anything, they can be kept simple as long as you use good shading and the flow of the maps is consistent.
So far 6 maps have been completed for this MOD and it's already on releaseable state, BUT it would be extremely nice to have more and more maps for it, that way it'sa nicer package.
Please take a look at the screenshots section of the modDatabase link so you can see this is a quality MOD that you could work on.
http://www.moddb.com/mods/10579/freerunner-mod-by-davox-featuring-dts-duke-plus