Mega Drive games with achievements:

Title	Achieve-ments	Points	Leader-boards
Last Battle	26	330 (1357)	-
Side Pocket	15	370 (1370)	-
Street Racer	18	300 (484)	-
Strider II	10	270 (1096)	-
~Hack~ Streets of Rage 2: Syndicate Wars	37	385 (451)	1
~Homebrew~ Commandos	22	200 (431)	-
~Unlicensed~ Super Tank War	24	400 (534)	1
Totals: 7 games	152	2255 (5723)	2

Nintendo 64 games with achievements:

Title	Achieve-ments	Points	Leader-boards
California Speed	18	270 (582)	-
Mario Tennis	29	395 (1116)	2
Totals: 2 games	47	665 (1698)	2

SNES games with achievements:

Title	Achieve-ments	Points	Leader-boards
Donkey Kong Country - Competition Edition	34	310 (3059)	67
Dragon Ball Z - Super Butouden	30	400 (670)	-
GunForce: Battle Fire Engulfed Terror Island	18	400 (741)	-
International Superstar Soccer	15	210 (831)	-
Midway Presents Arcade's Greatest Hits: The Atari Collection 1	14	280 (1853)	-
Nosferatu	3	50 (755)	-
Prince of Persia 2 - The Shadow and the Flame	30	400 (1181)	-
Top Gear 2	72	400 (953)	16
~Hack~ Prince of Persia Evolution	30	400 (659)	-
~Hack~ Super Mario World Bros.	40	400 (451)	-
~Hack~ Warios Adventure	51	392 (2464)	-
Totals: 11 games	337	3642 (13617)	83

Game Boy Advance games with achievements:

Title	Achieve-ments	Points	Leader-boards
Doom II	34	400 (1356)	-
Driver 2 Advance	22	400 (806)	4
Lode Runner Advance	28	400 (4556)	-
TMNT	18	300 (1017)	-
Wolfenstein 3-D	28	400 (1010)	-
Worms World Party	22	400 (2287)	-
Yu-Gi-Oh! Worldwide Edition: Stairway to the Destined Duel	30	400 (668)	1
~Hack~ Pokemon - Orange Version	30	400 (1468)	-
Totals: 8 games	212	3100 (13168)	5

Game Gear games with achievements:

Title	Achieve-ments	Points	Leader-boards
Aladdin	19	265 (1043)	-
Mortal Kombat II	24	400 (464)	-
Totals: 2 games	43	665 (1507)	0

Arcade games with achievements:

Title	Achieve-ments	Points	Leader-boards
Mega Man: The Power Battle	12	175 (549)	1
Super Sidekicks 2: The World Championship (Tokuten Ou 2: Real Fight Football)	20	400 (721)	-
Totals: 2 games	32	575 (1270)	1