21. Simcity (Maxis, 1989)
free in your web browser, so if you haven't checked out this gem yet, well, now you have no excuse.
The DOS release is also playable for free on the Internet Archive!
20. The Oregon Trail (MECC, 1985)
online via the Internet Archive), the fact that it's existed in some form since 1971 is proof that it has some serious staying power. The goal is simple enough - reach Oregon - but resource and risk management are key elements of the journey, with numerous random events (both helpful and not) giving it the feel of a roguelike in some respects. A few minigames appear too - hunting and river travel require some good old twitch skill, ensuring it holds appeal to arcade/console gamers as well.
19. Phantasy Star (Sega, 1988)
18. Maniac Mansion (LucasArts, 1987)
censored, it made up for it with an outstanding soundtrack that realized numerous genres with surprising accuracy on the hardware.
17. Ninja Gaiden II (Tecmo, 1989)
16. The Guardian Legend (Compile, 1989)
15. Mike Tyson's Punch-Out!! (Nintendo, 1987)
14. Ducktales (Capcom, 1989)
13. Metroid (Nintendo, 1986)
12. Ms. Pac Man (General Computer Corporation, 1982)
11. Bionic Commando (Capcom, 1988)
10. Bubble Bobble (Taito, 1986)
9. Batman (Sunsoft, 1989)
8. Final Fight (Capcom, 1989)
7. Contra (Konami, 1988)
6. Starflight (Binary Systems, 1986)
5. The Legend of Zelda (Nintendo, 1987)
4. Mega Man 2 (Capcom, 1989)
3. Ultima V: Warriors of Destiny (Origin Systems, 1988)
2. Tetris (Nintendo R&D1/Bullet Proof Software, 1989)
1. Super Mario Bros. (Nintendo, 1985)