These additions are a mix of new homebrew, unreleased games, hacks and translations, and demo scene releases.
GG_CaveDude
A previously unreleased Game Gear game, see http://www.indieretronews.com/2016/08/cave-dude-unreleased-prototype-for-game.html
GB_Carazu
A new gameboy game, see http://pdroms.de/gameboy/carazu-30-08-2016-gb-game
GB_Retroid
A new arkanoid type game for gameboy, see https://retroidgameboy.wordpress.com/
GBA_Hively
A "music disk" for GBA via the demo scene, see http://www.pouet.net/prod.php?which=52450
GBA_Mandrake
GBA_Phantom
Two unreleased GBA games about these comic book heroes, see http://www.retrocollect.com/News/roms-for-unreleased-phantom-and-mandrake-gba-games-foubd.html
GBA_STSoundAdvance
A "music disk" via the demo scene, of Atari ST music, see http://www.pouet.net/prod.php?which=3816
GBC_Infinity
A previously unreleased commercial RPG! See http://affinix.com/projects.html
SMS_PhantasyStar
The US/EU translated version is notoriously badly translated, it also has worse music than the original JP release. This is the SMS Power retranslation, with JP quality sound, see http://www.romhacking.net/translations/1069/
SMS_SkyFighter
A previously unreleased STG for Master System, see http://www.indieretronews.com/2016/08/sky-fighter-sms-shoot-em-up-dump-is.html
MDRIVECD_SonicCDPP
A hack of sonic cd with lots of gameplay improvements, see http://www.romhacking.net/hacks/1070/
MDRIVE_CastlevaniaBloodlinesEC
MDRIVE_ChikiChikiBoysEC
MDRIVE_DoubleDragonEC
MDRIVE_GoldenAxe2EC
MDRIVE_GoldenAxeCH
MDRIVE_JoeMacEC
MDRIVE_LionKingEC
MDRIVE_MidnightResistanceCH
MDRIVE_MortalKombatIIUEC
MDRIVE_OutRunColorHack
MDRIVE_SFIISCEEC
MDRIVE_SSFIIEC
MDRIVE_StreetsofRage2CH
MDRIVE_TMNTHyperHeistEC
MDRIVE_TwinkleTaleAS
MDRIVE_VaporTrailEC
Above are all "colour hacks" by Pyron. A few of these also have improved sound (e.g. the street fighter games). See http://www.romhacking.net/community/3226/
If you've not heard of these, here is an example of the difference in Streets of Rage 2:
MDRIVE_Dahna
First time translated, see http://www.romhacking.net/translations/2713/
MDRIVE_PCTennisIX
New homebrew tennis game, see http://www.indieretronews.com/2016/08/papi-commando-tennis-ix-homebrew-sport.html
MDRIVE_StarCruiser
First time this amazing looking game has been translated, see http://www.romhacking.net/forum/index.php/topic,22363.msg317132.html
MDRIVE_VilQ
New homebrew, see http://www.pouet.net/prod.php?which=68213
MDRIVE_TravelResist
A demoscene release, see http://www.pouet.net/prod.php?which=65975
MDRIVE32x_Shymmer
A "music disk" for the 32X of AY chip music, see http://www.pouet.net/prod.php?which=62175
NES_F1Circus
First time this famicom game has been translated: http://www.romhacking.net/translations/2724/
NES_FinalFantasyIII
The best translation yet of this game: http://www.romhacking.net/translations/2701/
NES_SuperPitfall30th
30th anniversary hack of this game, see http://www.romhacking.net/hacks/3060/
NES_TurquoisePalace
A "music disk" see http://www.pouet.net/prod.php?which=50897
NES_WizardThe
A demo scene created mini game, see http://www.pouet.net/prod.php?which=66527
N64_SuperMarioRun64
A day after the mobile game Mario Run was announced, a hack of Mario 64 was released which does the same thing: http://mariopartylegacy.com/2016/09/super-mario-run-already-recreated-in-super-mario-64/
PSX_JumpingFlash
PSX_JumpingFlash2
Jumping Flash was way ahead of its time, the PSX games plays well in CoinOPS, though without CDDA.
SG_SuperUwol
A new Mojon Twins game, this time for SG-1000, see http://www.mojontwins.com/juegos_mojonos/super-uwol-sg-1000/
SNES_700ClubThe
SNES_BreathofFireMusic
SNES_Lynchpack1
SNES_Lynchpack2
SNES_Lynchpack3
SNES_Lynchpack4
SNES_Lynchpack5
A set of "music disks" for the SNES
SNES_ConsoleWorld0294
SNES_ConsoleWorld0394
SNES_ConsolShock1
SNES_ConsolShock2
A set of "disk magazines" for the SNES.
SNES_ElixNu
SNES_Raiderbros
SNES_SmashItElix
Some fantastic demos for the SNES
SNES_GrumpsDreamCourse
A hack of Kirby's Dream Course, see https://www.reddit.com/r/KDCGameGrumps/comments/50kndy/grumps_dream_course_10_is_here_get_the_patch/
SNES_Hilda
A very arty homebrew platformer, see http://gamejolt.com/games/hilda/162284
SNES_SailorMoonSuperSFuwaFuwaPanic
First time this puzzle game has been translated, see http://www.romhacking.net/translations/2697/
SNES_Shadowhawk
Prototype of this unreleased game, see http://snescentral.com/article.php?id=1095
XBOX_XBREW_bi-won
XBOX_XBREW_ConfusionCrack
XBOX_XBREW_Doomsday
XBOX_XBREW_First
XBOX_XBREW_firstthethird
XBOX_XBREW_HarryBoterham
XBOX_XBREW_KrKr
XBOX_XBREW_mega2
XBOX_XBREW_miChera
XBOX_XBREW_PolarBearAler
XBOX_XBREW_Recovered
XBOX_XBREW_RecoveredTape
XBOX_XBREW_TEHROBOT
All the demos for the Xbox I could find that worked. Lots of details from here: http://www.pouet.net/prodlist.php?platform%5B%5D=XBOX&page=1
Putting together a pack like this takes quite some time but is very rewarding. It's available to CoinOPS contributors on the CoinOPS FTP site.