Conversion of Russ Wetmore's classic Atari game Sea Dragon for the Sinclair ZX81 suitably equipped with 32K RAM, AY/YM sound and UDG.§
Avoid contact with enemies or the environment. Don't run out of air. Surface regularly to refill your tanks.
ZXpand joystick or the following keys move your sub:
| Key | Direction |
|---|---|
| Q | Up |
| A | Down |
| N | Left |
| M | Right |
Space fires. Hold fire while moving to slow the sub's movement for tight spots.
RAM at 8-40K : Chroma / ZXPand / ZXpand+ UDG : UDG-For-ZXpand / CHR$128 mod (128 character mode)
Joystick : Kempston / Chroma / ZXpand+ / ZXpand-AY Sound : ZonX / Mr.X / ZXpand+ / ZXpand-AY
lasersstalactitesshootersdepth chargespixel movement torpedosscorefinal boss"laser" soundssub moves off after boss deathzxpand detectiontackle slowdownstop enemies after ship has passedcap number of enemies by disallowing mines when more than X objects active
congrats / teletyper?move on to restartgame over screenonly allow skipping zones to ones visitedpausehiscore / max zone savingship control, for tight spot maneuveringextra lives
- map cleanup
- improve sound effects
ship parts left behind when reversingexplosion parts left behind sometimescrash when ship goes into line 9chain sometimes doesn't falllaser graphically interferes with bulletsub collisions brokenenemies can fall below line 10torpedo passes through mine sometimessub exploding on line 9 crashes the game- controls get stuck sometimes
- not sure if this is a ZXpand issue, nature of input fns is that they will clear if left alone...
- control customisation
- other udg boards
- chroma
- sound on/off
- game over music