there's usually a voting system/thread that appears however it has not appeared yet
but good LAN staples are:
CS:S/CS:GO
TF2
flatout 2
dirt 2/3
unreal tournament 2004
killing floor
um.....sins.......
company of heroes (the expansions are not needed as the other payers can still use the expansion factions however you cant play the new factions unless you have it yourself)
starcraft 2
call of duty 4
natural selection 2
chivalry: medieval combat
Left 4 Dead 1&2
there's probably a good few more that will be suggested that i forgot but i think this is a reasonable list of them