What kind of goals does TF2 have? I was thinking of getting the orange box.
there are basically 3 different types of maps... every map there are two teams. red and blue.
one map, blue spawns right by a cart, red gets a min to setup defenses and then blue tries to push cart to the endpoint. you just have to be near the cart to move it... there are checkpoints along the way when you reach them, more time is added to the clock. once blue wins or loses, blue becomes red and red becomes blue.
2nd map type is there are 2 or more control points on a map. the control points initially are red, and blue needs to try to cap them. blue can't cap them if theres a red player on them, and the more blue players on the point, the faster they will cap it. once blue captures a control point it is locked and red can't capture it.
the 3rd map type and typically the most competitive type of map is there are 5 control points, at the beginning both red and blue control the 2 closest to their spawns. the middle point is grey. the red and blue teams race to the middle point to cap it, once blue caps a point or red caps a point, the other team can still cap it back. so this map type can go back and forth quite alot and forces players to play both offense and defense at the same time, unlike the other map types that put you in the role of either offense or defense depending on what team you're on.
edit: one more thing, tf2 has an overtime mechanic. so for the pushcart maps, if time runs out, it goes into overtime and the round does not end until blue does not touch the cart for i think 5 secs. with the capture point maps there is basically a bar and the bar needs to be all the defending team color, all red, for overtime to end. i don't think the 3rd type of map with the 5 capture points has an overtime mechanic.