All of these game modes are centered around objectives. Build this item, take it to that door. Escape the vicinity, destroy the markers, whatever. Some times I just want to mow down necromorphs, and tear apart humans. Would anybody else benefit from a game mode (maybe the multiplayer could be separated into "objective based" and "Deathmatch" modes, with maps retooled for the occasion) where you just fight to the death, and the species with the highest score/kill count wins?