I (bitRocky) accidentally found this game in Grunch, but it couldn't load the
sounds.
I tried to recompile the src (after installing "boost" sources), and found out
that
some ogg files failed to load.
These are the sounds:
   zap_scores.ogg, wrong_key.ogg, small_bonus.ogg, shot_collision.ogg, shot.ogg,
menu_select.ogg, alien_death.ogg

So I converted them to wave sounds and now it works!

Really nice game!

This is a recompile from HAKs version because some sounds failed to load.
---
old Readme from HAK:
This is just a quick port to MorphOS from HAK (haknakama.at).

For further instruction just use the included Docs and/or visit the
original website at http://www.noquarterarcade.com/
---
README from the author Todd Steinackle:

Classic Invaders is an alien shooter game written by Todd Steinackle.

To play launch the program and navigate the menu with the tab or up/down
arrow keys then select with the space bar or enter key. The esc key can be
used to exit any screen and the program itself.

The source code for Classic Invaders is released under a BSD license and is
available at http://www.noquarterarcade.com/.

The source can be built on Windows, Mac OS X, and Linux with no modifications.
The SDL, SDL_image, SDL_mixer, SDL_ttf, and boost libraries are needed.

--
Todd Steinackle
toddnoquarterarcade.com
http://www.noquarterarcade.com/

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[generic]                   60      73  82.2% -lh5- 27ec Jan 21 15:22 ClassicInvaders/AUTHORS
[generic]                  311     820  37.9% -lh5- ad25 Jan 21 15:22 ClassicInvaders/ChangeLog
[generic]               208902  208902 100.0% -lh0- d91a Jan 28 15:41 ClassicInvaders/Classic_Invaders
[generic]                 1535    1535 100.0% -lh0- caee Jan 21 21:04 ClassicInvaders/Classic_Invaders.info
[generic]                  821    1537  53.4% -lh5- 7745 Jan 21 15:22 ClassicInvaders/COPYING
[generic]                93239   93239 100.0% -lh0- 5010 Jan 21 15:22 ClassicInvaders/data/about_screen.ogg
[generic]                31452   31452 100.0% -lh0- 3ac5 Jan 21 15:22 ClassicInvaders/data/active_bonus.ogg
[generic]                 1515    1515 100.0% -lh0- 01d8 Jan 21 15:22 ClassicInvaders/data/alien-1-1.png
[generic]                 1596    1596 100.0% -lh0- ef42 Jan 21 15:22 ClassicInvaders/data/alien-1-2.png
[generic]                 1527    1527 100.0% -lh0- a6aa Jan 21 15:22 ClassicInvaders/data/alien-1-3.png
[generic]                 1606    1606 100.0% -lh0- bbe1 Jan 21 15:22 ClassicInvaders/data/alien-1-4.png
[generic]                 1114    1114 100.0% -lh0- 9939 Jan 21 15:22 ClassicInvaders/data/alien-2-1.png
[generic]                 1054    1054 100.0% -lh0- 58f5 Jan 21 15:22 ClassicInvaders/data/alien-2-2.png
[generic]                 1089    1089 100.0% -lh0- b74e Jan 21 15:22 ClassicInvaders/data/alien-2-3.png
[generic]                  999     999 100.0% -lh0- 1ada Jan 21 15:22 ClassicInvaders/data/alien-2-4.png
[generic]                  991     991 100.0% -lh0- 49eb Jan 21 15:22 ClassicInvaders/data/alien-3-1.png
[generic]                  934     934 100.0% -lh0- 44ee Jan 21 15:22 ClassicInvaders/data/alien-3-2.png
[generic]                  960     960 100.0% -lh0- 5619 Jan 21 15:22 ClassicInvaders/data/alien-3-3.png
[generic]                  910     910 100.0% -lh0- e289 Jan 21 15:22 ClassicInvaders/data/alien-3-4.png
[generic]                18879   18879 100.0% -lh0- 83e2 Jan 21 15:22 ClassicInvaders/data/aliens_landed.ogg
[generic]                 5821    5821 100.0% -lh0- b346 Jan 21 15:22 ClassicInvaders/data/alien_death.ogg
[generic]                 8809    9260  95.1% -lh5- f952 Jan 21 20:06 ClassicInvaders/data/alien_death.wav
[generic]                  626     626 100.0% -lh0- c3ba Jan 21 15:22 ClassicInvaders/data/background.png
[generic]               214670  214670 100.0% -lh0- 9903 Jan 21 15:22 ClassicInvaders/data/bg.ogg
[generic]               104477  104477 100.0% -lh0- 6608 Jan 21 15:22 ClassicInvaders/data/bg_1.ogg
[generic]               148620  148620 100.0% -lh0- 980d Jan 21 15:22 ClassicInvaders/data/bg_2.ogg
[generic]               169252  169252 100.0% -lh0- 286f Jan 21 15:22 ClassicInvaders/data/bg_3.ogg
[generic]               196778  196778 100.0% -lh0- 54cd Jan 21 15:22 ClassicInvaders/data/bg_4.ogg
[generic]                12634   12634 100.0% -lh0- 8557 Jan 21 15:22 ClassicInvaders/data/big_bonus.ogg
[generic]                 1615    1615 100.0% -lh0- c255 Jan 21 15:22 ClassicInvaders/data/bonus-1-1.png
[generic]                 1623    1623 100.0% -lh0- 23e5 Jan 21 15:22 ClassicInvaders/data/bonus-1-2.png
[generic]                 1375    1375 100.0% -lh0- f8cf Jan 21 15:22 ClassicInvaders/data/bonus-2-1.png
[generic]                 1370    1370 100.0% -lh0- a5d9 Jan 21 15:22 ClassicInvaders/data/bonus-2-2.png
[generic]                    0       0 ****** -lh0- 0000 Jan 21 21:21 ClassicInvaders/data/classic-invaders-scores
[generic]                  341    3126  10.9% -lh5- 7393 Jan 21 15:22 ClassicInvaders/data/classic-invaders.bmp
[generic]                 1497    4286  34.9% -lh5- 20e2 Jan 21 15:22 ClassicInvaders/data/classic-invaders.ico
[generic]                45107   45107 100.0% -lh0- 5ed3 Jan 21 15:22 ClassicInvaders/data/end_wave.ogg
[generic]                93911   93911 100.0% -lh0- 4578 Jan 21 15:22 ClassicInvaders/data/exit.ogg
[generic]                 8588    8588 100.0% -lh0- 9723 Jan 21 15:22 ClassicInvaders/data/explosion.ogg
[generic]                 3594    3594 100.0% -lh0- 9177 Jan 21 15:22 ClassicInvaders/data/explosion.png
[generic]                44239   44239 100.0% -lh0- 4db3 Jan 21 15:22 ClassicInvaders/data/free_guy.ogg
[generic]                18673   18673 100.0% -lh0- 3950 Jan 21 15:22 ClassicInvaders/data/game_over.ogg
[generic]                74148   74148 100.0% -lh0- e8a9 Jan 21 15:22 ClassicInvaders/data/help_screen.ogg
[generic]                72705  107920  67.4% -lh5- d753 Jan 21 15:22 ClassicInvaders/data/LiberationMono-Regular.ttf
[generic]                85609  133000  64.4% -lh5- c198 Jan 21 15:22 ClassicInvaders/data/LiberationSans-Bold.ttf
[generic]                93048  141132  65.9% -lh5- fc34 Jan 21 15:22 ClassicInvaders/data/LiberationSerif-Bold.ttf
[generic]                 8332    8332 100.0% -lh0- c796 Jan 21 15:22 ClassicInvaders/data/menu_select.ogg
[generic]                24779   31148  79.6% -lh5- 9e0f Jan 21 20:10 ClassicInvaders/data/menu_select.wav
[generic]               106625  106625 100.0% -lh0- 7827 Jan 21 15:22 ClassicInvaders/data/new_high_score.ogg
[generic]                16766   16766 100.0% -lh0- b453 Jan 21 15:22 ClassicInvaders/data/player_dead.ogg
[generic]                34698   34698 100.0% -lh0- 4f2c Jan 21 15:22 ClassicInvaders/data/player_rebirth.ogg
[generic]                  198     198 100.0% -lh0- 1a60 Jan 21 15:22 ClassicInvaders/data/shield_piece.png
[generic]                  317     317 100.0% -lh0- a529 Jan 21 15:22 ClassicInvaders/data/ship.png
[generic]                 3580    3580 100.0% -lh0- 833b Jan 21 15:22 ClassicInvaders/data/shot.ogg
[generic]                 3133    3580  87.5% -lh5- 833b Jan 21 15:22 ClassicInvaders/data/shot.ogg_
[generic]                 4995    5821  85.8% -lh5- b346 Jan 21 15:22 ClassicInvaders/data/shot.ogg_delme
[generic]                  208     208 100.0% -lh0- 2bb7 Jan 21 15:22 ClassicInvaders/data/shot.png
[generic]                 4140    4140 100.0% -lh0- 7b80 Jan 21 20:06 ClassicInvaders/data/shot.wav
[generic]                 6278    6278 100.0% -lh0- 5341 Jan 21 15:22 ClassicInvaders/data/shot_collision.ogg
[generic]                15000   24492  61.2% -lh5- bd0e Jan 21 20:09 ClassicInvaders/data/shot_collision.wav
[generic]                 8332    8332 100.0% -lh0- 5cc1 Jan 21 15:22 ClassicInvaders/data/small_bonus.ogg
[generic]                24779   31148  79.6% -lh5- 9e0f Jan 21 20:07 ClassicInvaders/data/small_bonus.wav
[generic]                92681   92681 100.0% -lh0- 34e1 Jan 21 15:22 ClassicInvaders/data/start_screen.ogg
[generic]                22672   22672 100.0% -lh0- 0b5e Jan 21 15:22 ClassicInvaders/data/start_wave.ogg
[generic]                49189   49189 100.0% -lh0- 3a49 Jan 21 15:22 ClassicInvaders/data/ui_header.png
[generic]                15337   15337 100.0% -lh0- c3fe Jan 21 15:22 ClassicInvaders/data/ui_points.png
[generic]                92011   92011 100.0% -lh0- 976d Jan 21 15:22 ClassicInvaders/data/wave_background.png
[generic]                10107   10107 100.0% -lh0- 3bdf Jan 21 15:22 ClassicInvaders/data/wrong_key.ogg
[generic]                59253  100652  58.9% -lh5- 53c9 Jan 21 20:12 ClassicInvaders/data/wrong_key.wav
[generic]                 6098    6098 100.0% -lh0- c99f Jan 21 15:22 ClassicInvaders/data/zap_scores.ogg
[generic]                25114   27820  90.3% -lh5- 3dd9 Jan 21 20:11 ClassicInvaders/data/zap_scores.wav
[generic]                  192     283  67.8% -lh5- 68e4 Jan 21 15:22 ClassicInvaders/NEWS
[generic]                63704   63704 100.0% -lh0- 45e6 Jan 21 21:28 ClassicInvaders/Preview.png
[generic]                  345     620  55.6% -lh5- 94c3 Jan 21 15:22 ClassicInvaders/README
[generic]                  406     690  58.8% -lh5- dd32 Jan 28 15:40 ClassicInvaders/Readme_MorphOS
[generic]                 7166    7306  98.1% -lh5- ca04 Jan 21 15:22 ClassicInvaders/Readme_MorphOS.info
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total        76 files 2485059 2691410  92.3%            Jan 28 21:33