+set g_invasion_type 0 "type of invasion mode - 0: round-based, 1: hunting, 2: complete the stage (note: use mapinfo to set this)"
+
+// ======
+// duel
+// ======
+set g_duel 0 "Duel: frag the opponent more in a one versus one arena battle"
+//set g_duel_warmup 180 "Have a short warmup period before beginning the actual duel"
+set g_duel_with_powerups 0 "Enable powerups to spawn in the duel gamemode"
+set g_duel_not_dm_maps 0 "when this is set, DM maps will NOT be listed in duel"