Double Dunk

This environment is part of the Atari environments. Please read that page first for general information.

Import	from pettingzoo.atari import double_dunk_v3
Actions	Discrete
Parallel API	Yes
Manual Control	No
Agents	agents= [‘first_0’, ‘second_0’]
Agents	2
Action Shape	(1,)
Action Values	[0,17]
Observation Shape	(210, 160, 3)
Observation Values	(0,255)

An adversarial game that combines control and precise selection.

The game has two stages: selection and play. Selection can be difficult because you have to hold the same action for a few steps and then take the 0 action. Strategy choice is timed: if a player does not select any action after 2 seconds (120 frames) then the player is rewarded -1, and the timer resets. This prevents one player from indefinitely stalling the game, but also means it is no longer a purely zero sum game.

Once play begins, each team has two players. You only control one at a time, and and which one you control depends on the selected play. Scoring should be familiar to basketball fans (2-3 points per successful shot).

Official double dunk manual

Environment parameters

Environment parameters are common to all Atari environments and are described in the base Atari documentation .

Action Space

In any given turn, an agent can choose from one of 18 actions.

Action	Behavior
0	No operation
1	Fire
2	Move up
3	Move right
4	Move left
5	Move down
6	Move upright
7	Move upleft
8	Move downright
9	Move downleft
10	Fire up
11	Fire right
12	Fire left
13	Fire down
14	Fire upright
15	Fire upleft
16	Fire downright
17	Fire downleft

Version History

• v3: Minimal Action Space (1.18.0)

• v2: No action timer (1.9.0)

• v1: Breaking changes to entire API (1.4.0)

• v0: Initial versions release (1.0.0)