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The round-up so far...

1. Chubbier, next not heavy

Fatter, then light > Faster Than Light (from Saeïdryl)

2. Goku's friend wheat powder

Krillin's flour > Killing Floor (from Saeïdryl)

3. Legolas' dishonesty

Elf Lie => Half Life (from Paige Meinke)

4. The Iron man's father balloon for showing-off

The Stan Lee (creator of Iron Man) parade balloon? -> The Stanley Parable

5. Hot beverage for Spartacus' fellows

Romans' sake -> No Man's Sky
Tea for Thracians -> Team Fortress 1
or
Tea for Thrace (the nation) -> Team Fortress

6. Higher cute marsupial

More tall wombat -> Mortal Kombat

7. Mixed great geographic feature

Stir ocean -> Star Ocean
Mountain blend -> Mount & Blade (from Milo P)

8. The 18th Ulysses, the 6th, the 15th and the greek 19th

Grant (18^th President) F (6^th letter of alphabet) O (15^th letter of alphabet) tau (19^th letter of Greek alphabet) -> Grand Theft Auto (from Gustavo Gabriel)

9. Assault a person

Mug a man -> Megaman

10. Evening meal animal flesh in hot water

Supper meat boil -> Super Meat Boy

Answer summary (thanks to everyone who solved the ones I couldn't):

1. Chubbier, next not heavy

Fatter, then light > Faster Than Light (solved by Saeïdryl)

2. Goku's friend wheat powder

Krillin's flour > Killing Floor (solved by Saeïdryl)

3. Legolas' dishonesty

Elf Lie => Half Life (solved by Paige Meinke)

4. The Iron man's father balloon for showing-off

The Stan Lee (creator of Iron Man) parade ball(oon) -> The Stanley Parable

5. Hot beverage for Spartacus' fellows

Romans' sake -> No Man's Sky
Tea for Thracians -> Team Fortress 1
or
Tea for Thrace (the nation) -> Team Fortress

6. Higher cute marsupial

More tall wombat -> Mortal Kombat

7. Mixed great geographic feature

Stir ocean -> Star Ocean
Mountain blend -> Mount & Blade (solved by Milo P)

8. The 18th Ulysses, the 6th, the 15th and the greek 19th

Grant (18^th President) F (6^th letter of alphabet) O (15^th letter of alphabet) tau (19^th letter of Greek alphabet) -> Grand Theft Auto (solved by Gustavo Gabriel)

9. Assault a person

Mug a man -> Megaman

10. Evening meal animal flesh in hot water

Supper meat boil -> Super Meat Boy

The round-up so far...

1. Chubbier, next not heavy

Fatter, then light > Faster Than Light (from Saeïdryl)

2. Goku's friend wheat powder

Krillin's flour > Killing Floor (from Saeïdryl)

3. Legolas' dishonesty

Elf Lie => Half Life (from Paige Meinke)

4. The Iron man's father balloon for showing-off

Still in the weeds on this one. Maybe it refers to Howard Stark, father of Tony Stark (a.k.a. Iron Man). Or maybe it refers to Ted Hughes, author ("father") of The Iron Man.

5. Hot beverage for Spartacus' fellows

Romans' sake -> No Man's Sky
Tea for Thracians -> Team Fortress 1
or
Tea for Thrace (the nation) -> Team Fortress

6. Higher cute marsupial

More tall wombat -> Mortal Kombat

7. Mixed great geographic feature

Stir ocean -> Star Ocean
Mountain blend -> Mount & Blade (from Milo P)

8. The 18th Ulysses, the 6th, the 15th and the greek 19th

Grant (18^th President) F (6^th letter of alphabet) O (15^th letter of alphabet) tau (19^th letter of Greek alphabet) -> Grand Theft Auto (from Gustavo Gabriel)

9. Assault a person

Mug a man -> Megaman

10. Evening meal animal flesh in hot water

Supper meat boil -> Super Meat Boy

The round-up so far...

1. Chubbier, next not heavy

Fatter, then light > Faster Than Light (from Saeïdryl)

2. Goku's friend wheat powder

Krillin's flour > Killing Floor (from Saeïdryl)

3. Legolas' dishonesty

Elf Lie => Half Life (from Paige Meinke)

4. The Iron man's father balloon for showing-off

The Stan Lee (creator of Iron Man) parade balloon? -> The Stanley Parable

5. Hot beverage for Spartacus' fellows

Romans' sake -> No Man's Sky
Tea for Thracians -> Team Fortress 1
or
Tea for Thrace (the nation) -> Team Fortress

6. Higher cute marsupial

More tall wombat -> Mortal Kombat

7. Mixed great geographic feature

Stir ocean -> Star Ocean
Mountain blend -> Mount & Blade (from Milo P)

8. The 18th Ulysses, the 6th, the 15th and the greek 19th

Grant (18^th President) F (6^th letter of alphabet) O (15^th letter of alphabet) tau (19^th letter of Greek alphabet) -> Grand Theft Auto (from Gustavo Gabriel)

9. Assault a person

Mug a man -> Megaman

10. Evening meal animal flesh in hot water

Supper meat boil -> Super Meat Boy

Partial:

5. Hot beverage for Spartacus' fellows

Romans' sake -> No Man's Sky
Tea for Thracians -> Team Fortress 1

6. Higher cute marsupial

More tall wombat -> Mortal Kombat

7. Mixed great geographic feature

Stir ocean -> Star Ocean
Mountain blend -> Mount & Blade (from Milo P)

9. Assault a person

Mug a man -> Megaman

10. Evening meal animal flesh in hot water

Supper meat boil -> Super Meat Boy

The round-up so far...

1. Chubbier, next not heavy

Fatter, then light > Faster Than Light (from Saeïdryl)

2. Goku's friend wheat powder

Krillin's flour > Killing Floor (from Saeïdryl)

3. Legolas' dishonesty

Elf Lie => Half Life (from Paige Meinke)

4. The Iron man's father balloon for showing-off

Still in the weeds on this one. Maybe it refers to Howard Stark, father of Tony Stark (a.k.a. Iron Man). Or maybe it refers to Ted Hughes, author ("father") of The Iron Man.

5. Hot beverage for Spartacus' fellows

Romans' sake -> No Man's Sky
Tea for Thracians -> Team Fortress 1
or
Tea for Thrace (the nation) -> Team Fortress

6. Higher cute marsupial

More tall wombat -> Mortal Kombat

7. Mixed great geographic feature

Stir ocean -> Star Ocean
Mountain blend -> Mount & Blade (from Milo P)

8. The 18th Ulysses, the 6th, the 15th and the greek 19th

Grant (18^th President) F (6^th letter of alphabet) O (15^th letter of alphabet) tau (19^th letter of Greek alphabet) -> Grand Theft Auto (from Gustavo Gabriel)

9. Assault a person

Mug a man -> Megaman

10. Evening meal animal flesh in hot water

Supper meat boil -> Super Meat Boy