I decided to attempt to recreate the menu screen from the original Amiga game, and it's now working! The camera is flying through a star field, panning on x/y at varying speeds, and alternating on z between flying forwards and backwards (also at varying speeds). The stars are each drawn in 1 of 8 shades of grey, depending on their current depth.


Unfortunately the GIF doesn't really do it justice with pixel artifacts resulting in some static stars and the flashing logo border not appearing very smooth.. But it looks much nicer running in CEmu, and even nicer again on calc





I'll try to back port this to the monochrome version as well.

The TI-83/84+ monochrome equivalent:

Small update on the CE version.. I've added in a couple more tiles, finished the explosion and door opening animations (although the latter isn't demonstrated here), finished the one-way laser beams, and drawn a placeholder alien sprite I'm having trouble getting the aliens to look how I want when reducing the original 32x32 sprites down to 16x16 (I suck with pixel art), so I might need to ask for help at some point - I'll see how I go

Looks awesome! Gave it a quick try this morning (but now I've got to get back to work). I noticed that you can shoot through walls by standing next to them.

I've updated to Beta 2, which now is almost a full CE port of the game as it was on the 83+/84+ (sans a few minor features, and proper enemy sprites).

Whilst a lot of the changes are bug fixes or porting little things across, the screenshot below shows the updated "air ducts", which are now 2x2 tiles, you can walk around the edge of them (but don't fall in!), and then how the CE handles the "power out" type effect on Episode I Level 11.

The download link is the same as before.



_{Edit (Eeems): Fixed link}

Just tried out the latest demo, but on my 84+, I would recommend having a "are you sure?" dialog on quit, or moving the quit button to [mode]. Accidentally hitting clear when using the arrow keys can be a little bit annoying ;P

A few more things have been done..

- Added the land mine trap in outdoor areas for Episode III
- Implemented basic floor tile randomisation that applies when levels are loaded
- Simple laser turret enemy for outdoor areas
- Tileset for the "Civilian Tower" areas now done
- 2 player co-op (same calc, no linkplay) now ported across to the CE



I hope to have another beta update in the next week or so

Any plans on implementing linkplay?

Nothing immediate, I tried in v2 but was struggling to get it to sync and maintain decent FPS. But I never say never, I'd like to get it working one day!

I'll have a 3rd beta release ready in a couple of days, but in the meantime, here's a preview of the tileset for the Military Tower levels..




EDIT: The 3rd beta can be downloaded here

_{Edit (Eeems): Fixed link}