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DeFRaG is a free software modification for id Software's first-person shooter computer game Quake III Arena (Q3A). The mod is dedicated to player movements and trickjumping. It aims at providing a platform for self-training, competition, online tricking, machinima making, and trickjumping. Hence it constitutes an exception among other Q3A mods. The mod includes a variety of features—timers and meters, ghost mode, cheat prevention and learning tools. Specially designed maps are provided that will rely on the player's movement abilities to be completed up to the finish line, while standard Q3A maps and Capture the Flag (CTF) fast captures are supported as well. Furthermore gamespace physics from both the original Q3A and the Challenge ProMode Arena (CPMA) mod are supported. The modification was released to the public in ca. September–October 2000. In 2002 DeFRaG was selected as "Mod of the Week" at Planet Quake.
