The content of your game is very important once you overcome the minor technical problems of writing the engine. ;) I'd say that a lerge number of interesting and distinct monster kinds makes for a very large part of a good roguelike game. And one of the most obvious things that differs the monsters are their special attacks and their effects.
The list is not supposed to be a list of all attack effects possible in a roguelike, nor a list of attack effects that every roguelike should have. It's supposed to serve as an inspiration for your own ideas.
- Hit -- Just your standard 'substract an amount of hp' attack.
* Wound -- Create a wound with long-term effect, ie. bleeding. * Push back -- The pc is pushed back by the force of attack. * Grab -- The pc can't move away from the monster. * Paralyze -- The pc can't do anything for several turns. * Sleep -- Like Paralyze, but it ends when pc is attacked. * Teleport -- The pc is teleported into random place. * Electric shock -- The attack ignores any metal armor. * Corrode -- Attack can damage metal armor. * Acid attack -- Attack can damage any armor. * Torch -- The pc is set on fire. * Fire attack -- Can damage scrolls/books/potions. * Fear -- The pc becomes afraid. * Confuse -- The pc moves around randomly. * Blind -- The pc becomes blind for some turns. * Steal -- The monsters takes an item from pc's inventory. * Pickpocket -- The monsters takes some gold from pc's inventory. * Sticky curse -- One piece of pc's equipment becomes sticky-cursed. * Disarm -- Makes pc drop his weapon. * Drain stat -- Lowers one of pc's statistics. * Permanent drain stat -- Lowers one of pc's statistics permanently. * Drain level -- Lowers pc's experience. * Silence -- The pc can't cast any spells for a number of turns. * Dispel -- Removes any magical effects from pc. * Energize -- Restores pc's mana. * Heal -- Restores pc's (and maybe other monster's) hp. * Trap -- Creates a trap. * Clone -- Creates a copy of the monster. * Mimic -- Makes the monster look/behave/have stats like the pc. * Amnesia -- Causes amnesia. * Steal spell -- Makes the pc forget one spell and gives it to the monster. * Summon -- Summons monsters. * Krezus curse -- Turns an item into gold. * Basilisk stare -- Turns an item/pc into rock. * Shoot -- Standard ranged attack. * Poison -- A stat of the pc decrease for some time. * Polymorph -- Targeted at other mosnters, changes their kind. * Teleport from -- Monster teleports away from the pc. * Teleport to -- Monster teleports to a sqare next to the pc. * Teleport to self -- The PC is teleported to a square beside the monster. * Darkness -- Makes the squares around pc dark. * Light -- Makes the squares around pc lit. * Earthquake -- Damages all creatures around. * Hunt -- The monster can attack another monster of specific kind and heal by killing it. * Aggravate -- Makes all the monsters around come here. * Stun -- Makes the pc unable to fight for the next turn. * Tumble down -- Makes the pc unable to walk for the next turn. * Idle -- No attack at all. * Suicide -- Kills the monster. * Armour-penetrating -- Like a normal attack, but bypasses (non-magical?) armour. * Madness -- Scares the target and drives it insane. * Disease -- Prevents health regeneration, possibly other effects too. Spreads by proximity. * Seduce -- Makes the pc take off his armor. * Charm -- Makes the pc unable to attack the monster. * Rise dead -- Creates zombies from monster corpses. * Make hungry -- Makes the pc hungrier. * Drain magic -- Decreases magical pluses, turns scrolls into empty scrolls, potions into potions of water. * Drain power -- Decreases pc's mana. * Switch places -- Switches places of pc and monster. * Slow -- the player isn't paralized but acts slower * good music -- increases the stats of all nearby friendly monsters * bad music -- damages and stuns the target. See sound attack :) * Curse -- inflicts the player with various curses that have negative effects but only lasts a short time * Time warp -- time clocks back at the point where the player entered the level * Phase out -- target disapears completly for a short time. No other adverse effects. * Throw buddy -- monster takes a smaller buddy and throws it at target. Both projectile and target takes damage * Fart bomb -- damages all creatures nearby every turn, for several turns. * Breathe fire -- damages monsters, say on 3 squares in a given direction. * Turn -- Turn the pc into a chicken (or something else) - he keeps his HP, but can't attack. * Wind - creates some kind of tornado that takes monsters and objects with it in some direction *