No, you cannot spawn monsters in Half-Life 1 through normal gameplay. The game progression does not involve a feature to directly spawn monsters.
monsters do not spawn from monster spawners in Peaceful mode. Peaceful mode prevents hostile mobs from spawning naturally and also from monster spawners, ensuring the game remains free from any hostile creatures.
open server.properties with notepad word ect and change spawn-monsters=true to spawn-monsters=false.
The game has a preset spawn pattern which will only keep a certain amounts of monsters onscreen at a time. If there are very little monsters onscreen, there must be a platform somewhere on the map that is FULL of them. Find it and kill them and you'll reset the spawn.
mobs will spawn anywhere within a 15x 15 chunk around the player. that means they can spawn from up to 240 blocks away from you.
you can only spawn monsters in creative mode they are in the bottom of the inventory, where you can drag and place the eggs to equip them. once you have them equipped throw the eggs to the ground, then depending on the egg (there are many types eg. creeper, pig, zombie.) a type of mob will spawn. hope it helps.
You spawn monsters in Minecraft. It just has to be in the creative world, unless you download a mod.The monsters you can spawn:EndermenCreeperBlazeMagma cubeSlimeSkeletonSpiderCave spiderZombieZombie PigmenGhast
well depends what house your in if its high mobs (monsters) will spawn but if they come in as a nightmare (which is a fail in sleep) you need to block all windows and put a door
Grass and stone blocks.
items from diffrent monsters
It gets darker and monsters begin to spawn
You could simply use a dispenser that automatically dispenses arrows when monsters stand on a pressure plate, but also monsters will not spawn in areas with torches. hope it helps