Here are some arms for Slot Bot.  The first one is basically a slab of iron on a steel cable that would spin around and smash stuff, but could also be wound up and thrown and reeled back in.  Next to the right is a fan chain saw weapon.  It's basically 5 chain saws lined up like a common ceiling fan.  Unnecessary?  Yes.  Middle left is the standard arm, it allows grabbing, punching all the fun stuff one can do with an arm. To the right of that is a cannon.  It's pretty devastating and would probably be the highest difficulty armament.  Bottom left is a shock gun.  It jolts out a low voltage spread of electrical currents that do little damage but has a large hit box.  Lastly is the Nerf weapon, a stuffed bunny head puncher.  Obviously the least effective of the bunch and what one hopes to be going against.

The illustration of Slot Bot is shown with the standard arm and shock gun.

This is my colored version of good ol' Slot Bot. 

This a robot I'm working on.  I wanted to get a few vehicles under my belt, and I thought this may be a stretch but probably qualifies.  It's supposed to be a obstacle of sorts that people trapped in a Colosseum would have to attack/ evade in order to free themselves.  I'm picturing it sitting in the middle of an arena motionless and the player has to go and pull the handle to trigger the slot machine and defeat it to open the door.  Depending on the results of the reels the bot's arms would change and would be more/less difficult.  I'm thinking about calling it SlotBot.  Clever right?