What's That Game? #123

16. Imperium

7. The Blackwell Legacy

Those are correct.

Final hints:

3. Ram_____ for CPC.
13. Part of a series that started in 1978.

3. Ramparts

Yep. 13 is Super Space Invaders.

1. Timestalkers (DC)
2. Xena: Warrior Princess (PS1)
3. Ramparts (CPC)
4. Battletoads (Arc)
5. Ashen (N-Gage)
6. Langrisser III (SS)
7. The Blackwell Legacy (PC)
8. Onimusha: Dawn of Dreams (PS2)
9. Duke Nukem (PC)
10. The Return of Ishtar (FM-7)
11. Mikie (C64)
12. Block Out (Lynx)
13. Super Space Invaders (SMS)
14. E.O.E.: Eve of Extinction (PS2)
15. Rebelstar: Tactical Command (GBA)
16. Imperium (SNES)
17. Daley Thompson's Decathlon (CPC)
18. Sonic Jam (SS)
19. Mario Bros. (G&W)
20. Karate Champ (Arc)