Graphics: GZDooM uses a nicely built OpenGL system, dosn't mean you can't play the game in Software though. GZDooM also uses Triliner and Biliner rendering, also you can choose no rendering for that Software feel in OpenGL mode. You can also use Hi-Res textures with GZDooM and MD2 / MD3 models (still in beta). Single Player: Decent, GZDooM keeps the classic feel of DooM Based Games with the new-age twist. Such as: Ultimate DooM, DooM 2, Heretic, HeXeN also Strife*. The use of the console (can be brought 'up' by pressing the ` key) can take away the fun of playing DooM Based Games by going to another map (i.e. 'map map30' for DooM 2) but still keep the fun for those who are tired of playing the other maps to get to ONE map. Multiplayer: Decent, fun. Similar to ZDooM, GZDooM dosn't have a great of a netcode, but dosn't mean it is not playable (around 50ms-95ms). You can host a 8 player game with some degree of lag. Sadly, theres only two modes: Coopertive (Co-op) and Deathmatch (DM). Gameplay: Fun, excellent gameplay, 'nuff said? GZDooM is bringing out the game of DooM in its own new twist. The GZDooM Twist. The twists are similar to that of Quake 3, corsair that changes color according to health, can make the corsair 'grow' when picking up the items, thats just scratching the surface, download and see for your self. Overall: Don't judge a book by its cover. GZDooM might look like a rip-off of ZDooMGL but its more than that, it has certian features that ZDooMGL dosn't have. The game is great in co-op, and rather good in Multiplayer. Don't suspect a non-lagging game because you can run into lag.