Keywords: Quake - family tree 2.svg id Tech family of video game engines by Id Software id Tech 1 debut in Quake in June 1996 Id Tech 2 debut in Quake II in December 1997 id Tech 3 debut in Quake III Arena December 1999 id Tech 4 debut in Doom 3 in August 2004 <br> Note id Tech 5 debut in Rage in October 2011 and id Tech 6 TBA are not available under the GNU General Public License GPL <br>Note Quake Wars Ray Traced and Wolfenstein Ray Traced are a different engines <br> Legend <span style color 85dc85 > –ˆ –ˆ</span> free/libre <span style color b1dae7 > –ˆ –ˆ</span> freeware <span style color cfcfcf > –ˆ –ˆ</span> commercial ellispe shape for games hexagon shape for engines fr Arbre généalogique de Quake Montre l'ensemble des jeux et des moteurs basés sur id Tech 1 version simplifiée Some information come from Wikipedia articles and the helpfull base Image Quake - family tree svg http //commons wikimedia org/w/index php title Image Quake_-_family_tree_2 svg action history Author list <gallery>File Quake_-_family_tree_2_Simplified svg</gallery> Quake Video game family trees |