“excellent”
PLAYABLE PREVIEW v0.1
Sinistar for Tandy Color Computer 3
A work-in-progress transcode of the Williams arcade classic for the CoCo 3. The goal is to reproduce the original game’s systems, pacing, sound, presentation and feel as closely as practical on real hardware.
| Version | Platform | Memory | Controls | File | Load With | Launch |
|---|---|---|---|---|---|---|
| v0.1 | Tandy CoCo 3 | 512K RAM | 2-button joystick | sinistar-preview-v01.zip | CoCoSDC / compatible | RUN"SINI" |
CONTROLS & OBJECTIVE
How To Play
Shoot Planetoids to break out Crystals. Workers collect those Crystals to build Sinistar, so stop them before they finish. Warriors attack you while the pressure builds. Once Sinistar is complete, use your Sinibombs to fight back and survive.
| 5 | Insert Coin |
|---|---|
| 1 | Start 1 Player |
| Joystick | Move / steer your ship |
| Button A | Fire |
| Button B | Sinibomb |
TARGET GUIDE
 Planetoid
|
0 PTSShoot it to release Crystals. |
|---|---|
 Crystal
|
+200 PTSCollect it to add a Sinibomb. |
 Worker
|
+150 PTSDestroy it before it delivers Crystals to Sinistar. |
 Warrior
|
+500 PTSDestroy this aggressive attacker. |
PLAYER GEAR
 Spaceship
|
YOUR SHIPMove with the joystick, fire with Button A, and stay alive. |
|---|---|
 Sinibomb
|
SPECIAL WEAPONLaunch with Button B. Use Sinibombs against Sinistar once he is complete. |
CURRENT BUILD
What’s in Playable Preview v0.1
PLAYERMovement, directional control, firing, scrolling playfield, scoring, HUD and scanner.
PLANETOIDSDestruction, debris and crystal spawning.
WORKERSMovement, directional animation, crystal collection and Sinistar construction behavior.
WARRIORSPursuit and firing.
SINISTARConstruction, completed chase behavior, sampled speech and combat systems.
SINIBOMBSLaunch, homing and damage behavior.
PRESENTATIONCredits, INSERT COIN behavior, startup presentation, Game Over return and static attract pages.
AUDIOSound effects and sampled Sinistar speech.
PLAYABLE PREVIEW FEEDBACK
Tell Me What You Think
APPROVED FEEDBACK
WORK IN PROGRESS
Still in Development
- AI-controlled attract/demo sequence
- High-score entry and persistence
- Two-player alternating play
- Arcade timing and difficulty tuning
- Performance and long-session regression testing
Sinistar is an original Williams Electronics arcade game. This is an independent fan development project for the Tandy Color Computer 3 and is not affiliated with or endorsed by the original rights holders.
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