Mega Drive games with achievements:

Title	Achieve-ments	Points	Leader-boards
Last Battle	26	330 (1447)	-
Side Pocket	16	380 (2144)	-
Street Racer	18	300 (494)	-
Strider II	10	270 (1258)	-
~Hack~ Streets of Rage 2: Syndicate Wars	37	385 (452)	1
~Homebrew~ Commandos	22	200 (426)	-
~Unlicensed~ Super Tank War	24	400 (524)	1
Totals: 7 games	153	2265 (6745)	2

Nintendo 64 games with achievements:

Title	Achieve-ments	Points	Leader-boards
California Speed	20	330 (284)	-
Mario Tennis	29	395 (1050)	2
Totals: 2 games	49	725 (1334)	2

SNES games with achievements:

Title	Achieve-ments	Points	Leader-boards
Donkey Kong Country - Competition Edition	34	310 (3001)	68
Dragon Ball Z - Super Butouden	30	400 (690)	-
GunForce: Battle Fire Engulfed Terror Island	18	400 (762)	-
International Superstar Soccer	15	210 (807)	-
Midway Presents Arcade's Greatest Hits: The Atari Collection 1	14	280 (1153)	-
Nosferatu	3	50 (713)	-
Prince of Persia 2 - The Shadow and the Flame	30	400 (1284)	-
Top Gear 2	72	400 (969)	16
~Hack~ Prince of Persia Evolution	30	400 (709)	-
~Hack~ Super Mario World Bros.	40	400 (451)	-
~Hack~ Wario’s Adventure	51	350 (1846)	-
Totals: 11 games	337	3600 (12385)	84

Game Boy Advance games with achievements:

Title	Achieve-ments	Points	Leader-boards
Doom II	34	400 (1302)	-
Driver 2 Advance	22	400 (910)	4
Lode Runner Advance	28	400 (5457)	-
TMNT	18	300 (1439)	-
Wolfenstein 3-D	28	400 (979)	-
Worms World Party	22	400 (2283)	-
Yu-Gi-Oh! Worldwide Edition: Stairway to the Destined Duel	29	179 (2476)	1
~Hack~ Pokemon - Naranja Version	30	400 (1447)	-
Totals: 8 games	211	2879 (16293)	5

Game Gear games with achievements:

Title	Achieve-ments	Points	Leader-boards
Aladdin	19	265 (1013)	-
Mortal Kombat II	24	400 (537)	-
Totals: 2 games	43	665 (1550)	0

Arcade games with achievements:

Title	Achieve-ments	Points	Leader-boards
Mega Man: The Power Battle	12	175 (572)	1
Super Sidekicks 2: The World Championship (Tokuten Ou 2: Real Fight Football)	20	400 (866)	-
Totals: 2 games	32	575 (1438)	1