Slot machines are interactive objects introduced in Borderlands 2. They can drop anything from weapons, to a live grenade depending on the result.

Contents 1 Known combinations and rewards 2 Probability of Winning 3 Locations 4 Notes 5 Sources

Known combinations and rewards

• First and second symbols different (regardless of 3rd): No reward
• Any 2 matching with bell at the end: One to Three piles of Cash
• Two bells with any non-psycho mask at the end: One to Three piles of Cash
• 3 Bells: Three Piles of Cash
• 3 sevens: Character skin from a manufacturer e.g. Vladof Sickle.
• Any 2 matching with psycho mask at the end: White weapon
• 3 cherries: Green weapon.
• 3 legs: Blue weapon. Or, rarely, purple weapon

  

• 3 Marcus: Purple weapon.
• 3 Vault Signs: Orange weapon.^[1]
• 3 Psycho masks: The slot machine will drop a live grenade from the reward box, similar to the ones that Suicide Psychos use. This is a completely normal grenade and will damage any player character in the blast radius, not just the Vault Hunter who actually used the slot machine. The damage dealt by the grenade is scaled to the level of loot in the machine.
• 3 Eridium bars: Stack of 4 Eridium bars. On rare occasions a jackpot will trigger that spews out around a dozen stacks of single eridium bars.
• 3 double Eridium bars: Two stacks of 4 Eridium bars (8 total)
• 3 triple Eridium bars: 12 individual Eridium bars

Skins, pistols, eridium, live grenades, and cash will be dispensed from the front drawer. All non-pistol weapons from the side drawer. Live grenades and eleven of the twelve eridium bars from a triple eridium reward will drop to the floor.

Probability of Winning

With each slot pull, a value ranging from 0 to 32,767 (2¹⁵ - 1) is assigned. Assuming that this value is randomly assigned, probabilities of winning can be obtained.

Value	Outcome	Frequency out of 32,768	1 in X Chance	Percentage
0-6711	White Weapon	6712	5	20.48
6712-11745	Green Weapon	5034	7	15.36
11746-12249	Blue Weapon	504	65	1.54
12250-12299	Purple Weapon	50	655	0.15
12300-12305	Orange Weapon	6	5461	0.02
12306-13143	Single Eridium	838	39	2.56
13144-13395	Double Eridium	252	130	0.77
13396-13470	Triple Eridium	75	437	0.23
13471-21860	Money	8390	4	25.60
21861-24377	Grenade	2517	13	7.68
24378-26055	Skin	1678	20	5.12
26056-32767	Nothing	6712	5	20.48

Locations

• Sanctuary (x2) in Moxxi's - Complete 'Jackpot!' challenge if hitting three Vault symbols or three Triple Eridium bars on either of these machines.
• The Dust in a gas station at the Old Dahlwell Oasis
• The Holy Spirits
• Carried by One Armed Bandits
• Badass Crater Bar (x2) upstairs (there are also 2x Torgue Slot Machines nearby).

Notes

• If multiple players attempt to activate the same slot machine at the same time, all players will be charged, but the machine will only spin once.
• Slot machines are more efficient when playing in a group, in that Eridium and cash winnings are multiplied by the number of players since each receives the winning amount without division.
• The price of a slot machine is determined by the level of the loot inside it. Sanctuary's slot machines increase in level as the main storyline missions are completed.

Sources

Borderlands 2 - 2times triple eridium bars at slot machineBorderlands 2 - 2times triple eridium bars at slot machine:

http://youtu.be/jnxNl4QW3rM

1. ↑ http://www.youtube.com/watch?v=bRl_tQGZwSY