Archon II: Adept is a 1984 computer game developed by Jon Freeman, Paul Reiche III and Anne Westfall, and distributed by Electronic Arts (and Ariolasoft in Europe) for various platforms.
Adept is a hybrid of a tactical board game and action. It's not based around a chess motif, as the original Archon is, but maintains the concept of "good vs. evil", one on one combat, magic and power points.
Like its predecessor, Adept is a struggle between two opposing sides that takes place on a game board, complete with playing pieces, but instead of capturing pieces enter a battle screen and duel to the death.
The board is a rectangle with four roughly concentric bands, corresponding to the four elements of Earth, Wind, Fire, and Water. Two non-elemental squares along the vertical center are "Void." Two decorative citadel squares pad the horizontal center. Each player starts with four wizards called "Adepts" that can cast spells, in particular a summoning spell used to bring the other pieces into play.
On a turn, a player must either move a piece or use an Adept to cast a spell. Summoned pieces can move any distance in their element, or move one square out of their element. Adepts teleport anywhere. Pieces may not enter occupied squares except as an attempt to capture an opponent's piece. Capture attempts are resolved immediately and the defeated piece is removed from the board. The turn then ends.
The game's sole resource is magical energy, used for spellcasting, paying a per-turn upkeep cost for each summoned piece, and the Adepts' teleportation. It's gained by having friendly pieces occupying squares with power points. Four power points are on the outer edges of one element at a time, moving inwards after every pair of turns. Two power points with lower income rates are on the Void squares.
The starting side can be chosen or randomized. The side that goes second receives more magical energy.