The original DM_Fallen2 was pretty simple and badly balanced that's why many players tried to fix and improve it.
Maplist:
DM_Fallen2_chan (by killua-chan)
DM_Fallen2_t (by killua-chan)
DM_Fallen2te (edited by PKeuro & gellehsak. This is one of the first duel maps.)
DM_Fallen3 (by PlanetPK, gritt)
DM_Fallen3_BETA7
DM_Fallen3_BETA8
Copy the map to your Painkiller\Data game directory, for example C:\Program Files\DreamCatcher\Painkiller\Data