Here is a small list of all avaliable GP32 games, this also includes ported games or game engines such as doom... which ones of them are the greatest? Maybe you'll even discover games which are already forgotten...
15 Day Crap (I Cant Draw But I Can Fly) by Mithris.zip
32 Degrees Snowboarding by Thomas Schwebel.zip
Ah Catsmanga Daioh (08 August 2003).zip
Air Rage by Taras.zip
Alien Eraser by Jeremi Lettoli.zip
Andyman in Paint-A-Balls Land v1.0 by EmumanX.zip
Animings by Guillem Reinoso.zip
Aoi Yume (Blue Dream) by Orion_.zip
Apunta y Dispara by Nuria.zip
Arcano v1.0 by Franz Lankes.zip
Arcanoid v0.51 by 0x800 (Trapflag).zip
B3 v0.1a by Tailzone.zip
Battle Ship GP by Kikuta.zip
Battleships32 v1.0 by Kedo.zip
BG Heh (28-4-2003).zip
BG Hexa v0.2.1 by bingeun.zip
BG Puyo v0.2.1 by bingeun.zip
BG Tetris v0.2.1 by bingeun.zip
Bichos by Sergio Martin.zip
Binggo.zip
Bird Shoot v0.3 by FagEmul.zip
Blister Ball by Brain Postma.zip
Bloody Rescue by Thomas Gonnin.zip
Blop Blop v0.1 (Beta 1 66mhz) by JyCet.zip
Blue Mable (1-6-2003).zip
Bluegol Snake by Blue Wind.zip
Bob The Amazing Lemon v0.2 by Woogal.zip
BOB Tron by woogal.zip
Bolcatoid v1.0 by Jean-Baptiste Bolcato.zip
BOR v0.51 by Squidge.zip
Bouncing Bill 2 v0.1 by Feeblez.zip
Bouyou.zip
Breakout by Brain Postma.zip
Breakout by JBB.zip
Bug Attack (25-4-2004) by JyCet.zip
Car Race v1.01 by Pion.zip
Casca Naves v1.3 Beta by Theif.zip
Cascade v0.3 by Flyguy.zip
Chicken 2 by Loki666b.zip
Chicken Escape by Avseth.rar
Collateral Damages v0.8 by Edorul.zip
Columns v0.03 by Bee32.zip
Connect-4 by clem.zip
Crazy Jack by JyCet.zip
Darts v0.4 by Guyfawkes.zip
D-Circus (Beta 1).zip
Deep Ship by Joseph Le Brech.zip
Defendguin (Beta 1).zip
Doom v9 (Engine Port - No WAD) by Tom Forsyth and Craig Rothwell and Rob Brown.zip
Drop Blocks by Rich.zip
Drunken Frogger.zip
DynaMate v2.0 by Flavor.zip
Electronia by Akuma no Houkon.zip
Elf Logic v0.9 by System Gear.zip
Elite - The Newkind v0.05 by Muaddib.zip
Entropy by Alain Saas.zip
Escape From Llama (Alpha 2) by Jum.zip
Falldown.zip
Fire and Fire by Icon.zip
Flip Over by DonSkeeto.tar.gz
Flipit v0.6 by JyCet.zip
Formula 1 v0.35 by Nicolas Doualot.zip
Fruitee by Rich.zip
Gamasumo by Warsong.zip
Game Partner 32 v1.0 by Thor.zip
GaPlaam32 v0.1 by Edhel.zip
Gianas Return v0.90.zip
Giri Giri Walker v0.1 by Tailzone.zip
Giro by Franz Lankes.zip
GlooP by Jamie Lyon.zip
GP Asteroids by giffel.zip
GP Ataxx v0.4 by Jean-Batiste Langlois.zip
GP Blocks v1.0 by Andreas Gustafsson.zip
GP moron v0.23 by Snesy.zip
GP Chess v0.5 by rcx21000.zip
GP Final War v0.5 by mATkEUpON.zip
GP Games RU Edition.rar
GP Gravity Force v2.0 by David Douglas.zip
GP Jewel v0.815 by Valken Lee.zip
GP Mine v0.1 by Valken Lee.zip
GP Moria (early beta) by Rich.zip
GP Pang v0.82 by Michel Louvet.zip
GP Pong v0.96 by Wave.rar
GP Robot 31052002 by Oedalpha.zip
GP Same v0.1 by Fieldman.zip
GP Snake v0.1 by Firefly.zip
GP Squares (2-4-2004) by Akuma no Houkon.zip
GP Sweeper v1.01 by White Falcon.zip
GP Tetris v1.00 Final by OMSK.zip
GP Torus 06072002 by Oedalpha.zip
GP32 Bomber v0.8 by Nokturn.zip
GP32 Car by Pocholle Alexandre.zip
GP32 Card Casino by Flavor and ShubE.zip
GP32 Pong v1.5 by Nokturn.zip
GP32 Snow by Pocholle Alexandre.zip
GP32 War (27-4-2004) by aquafish.zip
GPicross v0.07 by Yenaphe.zip
Guess A Number v1.0 by Nokturn.zip
Gyratron (WIP version) by Jum.zip
Handfingers by Gauthier Plouvier.zip
Heretic v0.2 (Engine Port - No WAD) by Firefly.zip
Hexafere by Franz Mandl.zip
Insane Nights (15-5-2004) by Mad Tea Cup.zip
Jamidar by Brain Postma.zip
Jatris by Brain Postma.zip
Jump n Bump v0.044a by GeneticNova.zip
Jump n Bump v0.046a by GeneticNova.zip
KOF91 v1.4 by Thor.zip
KOF91 v1.41 by Thor.zip
LapiGP (Beta 1) by Alexander Beug.zip
Liero-GP v0.5 by Marc.zip
LK Go v0.3 by Lapkill.zip
LK Shoot (GBAX 2003) by Ronan Leroy.zip
Llamaboost v1.2 by The Wub.zip
Lol Fighters v1.0 by Damien Corrado.zip
Lone32 by Bee32.zip
Magical Quest by Matthieu Gazin.zip
Memoritron32 by Metellius.zip
Miner (Mine Sweeper) v0.4.zip
miNiboyz by Thomas Schwebel.zip
Mr. Monar v0.1 by Tailzone.zip
mRPG by Aoyama.zip
Mya Mya Rocket (20-2-2004) by Jean-Batiste Langlois.zip
Nibbler 2003 (14th March 2003) by sack.zip
Nibbles by EpiGP.zip
NoiDZ v0.1 by rov.zip
N-Tris by FagEmul.zip
Numo by ref and Madcat.zip
Perfect Fit (28-3-2004) by Akuma no Houkon.zip
Pipe Panic (Test Release) by NoBrain2K.zip
Poker Squares by Rich.zip
PTC (for GP32) v1.0 by Oscar BraindeaD.zip
Puissance 4 by EpiGP.zip
Puzzle Mix by Guillem Reinoso.zip
Rackets GP by Saharoo.zip
Rise Of The Triads v1.0 (Engine Port) by Sep.zip
Seawolf by DonSkeeto.zip
Slyro the Radioactive Cat by Slyro.zip
Sokoban v1.0 by clem.zip
Speck Invaders by Brain Postma.zip
Squad 14 (pre-release) by Metellius.zip
Star Dust v1.0 Alpha by Kostas Kostiadis.zip
Stuff In Space by EmumanX.rar
Tailgunner by Graham.zip
Tetris for GP32 v0.1.zip
The New Trip Of Peuppy by Satu Lagi.zip
The Numerix Trip Of Peuppy by Fuflo Lagi and Satu Lagi.zip
Tic Tac Toe v1.0 by White Falcon.zip
Tiny Tetris v.095a by Abitos.zip
Tony Targets Beta (27-04-2003) by The Wub.zip
Tunnel Game 3D Tech Demo v0.1 Andreas Gustafsson.zip
Universal Mercenary by donskeeto and kissbengt.zip
Vector (Beta 1).zip
Vertical Shooter by Synkro.zip
Vexed v1.0.zip
Vorton (Beta 2).zip
Xigon 1 (21-3-2004) by EmumanX.zip
xRick (GP32) v1.2 by Anders Granlund and SDW.zip
XScape by StudioX64.zip
Yahtzee v0.2 by Guyfawkes.zip
Ye Fly The Chopper v0.9 by Pion.zip
Yet Another Sokoban Clone dr4 by Tommy Widenflycht.zip
15 Day Crap (I Cant Draw But I Can Fly) by Mithris.zip
32 Degrees Snowboarding by Thomas Schwebel.zip
Ah Catsmanga Daioh (08 August 2003).zip
Air Rage by Taras.zip
Alien Eraser by Jeremi Lettoli.zip
Andyman in Paint-A-Balls Land v1.0 by EmumanX.zip
Animings by Guillem Reinoso.zip
Aoi Yume (Blue Dream) by Orion_.zip
Apunta y Dispara by Nuria.zip
Arcano v1.0 by Franz Lankes.zip
Arcanoid v0.51 by 0x800 (Trapflag).zip
B3 v0.1a by Tailzone.zip
Battle Ship GP by Kikuta.zip
Battleships32 v1.0 by Kedo.zip
BG Heh (28-4-2003).zip
BG Hexa v0.2.1 by bingeun.zip
BG Puyo v0.2.1 by bingeun.zip
BG Tetris v0.2.1 by bingeun.zip
Bichos by Sergio Martin.zip
Binggo.zip
Bird Shoot v0.3 by FagEmul.zip
Blister Ball by Brain Postma.zip
Bloody Rescue by Thomas Gonnin.zip
Blop Blop v0.1 (Beta 1 66mhz) by JyCet.zip
Blue Mable (1-6-2003).zip
Bluegol Snake by Blue Wind.zip
Bob The Amazing Lemon v0.2 by Woogal.zip
BOB Tron by woogal.zip
Bolcatoid v1.0 by Jean-Baptiste Bolcato.zip
BOR v0.51 by Squidge.zip
Bouncing Bill 2 v0.1 by Feeblez.zip
Bouyou.zip
Breakout by Brain Postma.zip
Breakout by JBB.zip
Bug Attack (25-4-2004) by JyCet.zip
Car Race v1.01 by Pion.zip
Casca Naves v1.3 Beta by Theif.zip
Cascade v0.3 by Flyguy.zip
Chicken 2 by Loki666b.zip
Chicken Escape by Avseth.rar
Collateral Damages v0.8 by Edorul.zip
Columns v0.03 by Bee32.zip
Connect-4 by clem.zip
Crazy Jack by JyCet.zip
Darts v0.4 by Guyfawkes.zip
D-Circus (Beta 1).zip
Deep Ship by Joseph Le Brech.zip
Defendguin (Beta 1).zip
Doom v9 (Engine Port - No WAD) by Tom Forsyth and Craig Rothwell and Rob Brown.zip
Drop Blocks by Rich.zip
Drunken Frogger.zip
DynaMate v2.0 by Flavor.zip
Electronia by Akuma no Houkon.zip
Elf Logic v0.9 by System Gear.zip
Elite - The Newkind v0.05 by Muaddib.zip
Entropy by Alain Saas.zip
Escape From Llama (Alpha 2) by Jum.zip
Falldown.zip
Fire and Fire by Icon.zip
Flip Over by DonSkeeto.tar.gz
Flipit v0.6 by JyCet.zip
Formula 1 v0.35 by Nicolas Doualot.zip
Fruitee by Rich.zip
Gamasumo by Warsong.zip
Game Partner 32 v1.0 by Thor.zip
GaPlaam32 v0.1 by Edhel.zip
Gianas Return v0.90.zip
Giri Giri Walker v0.1 by Tailzone.zip
Giro by Franz Lankes.zip
GlooP by Jamie Lyon.zip
GP Asteroids by giffel.zip
GP Ataxx v0.4 by Jean-Batiste Langlois.zip
GP Blocks v1.0 by Andreas Gustafsson.zip
GP moron v0.23 by Snesy.zip
GP Chess v0.5 by rcx21000.zip
GP Final War v0.5 by mATkEUpON.zip
GP Games RU Edition.rar
GP Gravity Force v2.0 by David Douglas.zip
GP Jewel v0.815 by Valken Lee.zip
GP Mine v0.1 by Valken Lee.zip
GP Moria (early beta) by Rich.zip
GP Pang v0.82 by Michel Louvet.zip
GP Pong v0.96 by Wave.rar
GP Robot 31052002 by Oedalpha.zip
GP Same v0.1 by Fieldman.zip
GP Snake v0.1 by Firefly.zip
GP Squares (2-4-2004) by Akuma no Houkon.zip
GP Sweeper v1.01 by White Falcon.zip
GP Tetris v1.00 Final by OMSK.zip
GP Torus 06072002 by Oedalpha.zip
GP32 Bomber v0.8 by Nokturn.zip
GP32 Car by Pocholle Alexandre.zip
GP32 Card Casino by Flavor and ShubE.zip
GP32 Pong v1.5 by Nokturn.zip
GP32 Snow by Pocholle Alexandre.zip
GP32 War (27-4-2004) by aquafish.zip
GPicross v0.07 by Yenaphe.zip
Guess A Number v1.0 by Nokturn.zip
Gyratron (WIP version) by Jum.zip
Handfingers by Gauthier Plouvier.zip
Heretic v0.2 (Engine Port - No WAD) by Firefly.zip
Hexafere by Franz Mandl.zip
Insane Nights (15-5-2004) by Mad Tea Cup.zip
Jamidar by Brain Postma.zip
Jatris by Brain Postma.zip
Jump n Bump v0.044a by GeneticNova.zip
Jump n Bump v0.046a by GeneticNova.zip
KOF91 v1.4 by Thor.zip
KOF91 v1.41 by Thor.zip
LapiGP (Beta 1) by Alexander Beug.zip
Liero-GP v0.5 by Marc.zip
LK Go v0.3 by Lapkill.zip
LK Shoot (GBAX 2003) by Ronan Leroy.zip
Llamaboost v1.2 by The Wub.zip
Lol Fighters v1.0 by Damien Corrado.zip
Lone32 by Bee32.zip
Magical Quest by Matthieu Gazin.zip
Memoritron32 by Metellius.zip
Miner (Mine Sweeper) v0.4.zip
miNiboyz by Thomas Schwebel.zip
Mr. Monar v0.1 by Tailzone.zip
mRPG by Aoyama.zip
Mya Mya Rocket (20-2-2004) by Jean-Batiste Langlois.zip
Nibbler 2003 (14th March 2003) by sack.zip
Nibbles by EpiGP.zip
NoiDZ v0.1 by rov.zip
N-Tris by FagEmul.zip
Numo by ref and Madcat.zip
Perfect Fit (28-3-2004) by Akuma no Houkon.zip
Pipe Panic (Test Release) by NoBrain2K.zip
Poker Squares by Rich.zip
PTC (for GP32) v1.0 by Oscar BraindeaD.zip
Puissance 4 by EpiGP.zip
Puzzle Mix by Guillem Reinoso.zip
Rackets GP by Saharoo.zip
Rise Of The Triads v1.0 (Engine Port) by Sep.zip
Seawolf by DonSkeeto.zip
Slyro the Radioactive Cat by Slyro.zip
Sokoban v1.0 by clem.zip
Speck Invaders by Brain Postma.zip
Squad 14 (pre-release) by Metellius.zip
Star Dust v1.0 Alpha by Kostas Kostiadis.zip
Stuff In Space by EmumanX.rar
Tailgunner by Graham.zip
Tetris for GP32 v0.1.zip
The New Trip Of Peuppy by Satu Lagi.zip
The Numerix Trip Of Peuppy by Fuflo Lagi and Satu Lagi.zip
Tic Tac Toe v1.0 by White Falcon.zip
Tiny Tetris v.095a by Abitos.zip
Tony Targets Beta (27-04-2003) by The Wub.zip
Tunnel Game 3D Tech Demo v0.1 Andreas Gustafsson.zip
Universal Mercenary by donskeeto and kissbengt.zip
Vector (Beta 1).zip
Vertical Shooter by Synkro.zip
Vexed v1.0.zip
Vorton (Beta 2).zip
Xigon 1 (21-3-2004) by EmumanX.zip
xRick (GP32) v1.2 by Anders Granlund and SDW.zip
XScape by StudioX64.zip
Yahtzee v0.2 by Guyfawkes.zip
Ye Fly The Chopper v0.9 by Pion.zip
Yet Another Sokoban Clone dr4 by Tommy Widenflycht.zip