Alien Invasion is a first-person shooting game where the player must survive attacks from enemies by killing them or avoiding them. There are three difficulty modes - Noob, Regular, and Pro - with different environments and enemy abilities. The player's score is based on survival time and enemies killed. Gameplay involves shooting enemies with a gun that must be reloaded, and the player's health and ammo are displayed on screen.

1. ALIEN INVASION
A FIRST PERSON SHOOTING GAME

2. PREFACE
• Alien Invasion (AI) is basically a first person shooting game.
• The game is played in survival mode, where the player has to survive from the
enemies either by killing them or by keeping himself/herself away from the
enemies.
• The gameplay emphasized both on the time the player survived and the number
of enemy he/she killed so does the scoring mechanics.
• There are three playing mode namely ‘Noob’, ‘Regular’ and ‘Pro’. The ‘Noob’ is
easier mode and ‘Pro’ is harder mode.
• There are two types of enemies with varieties in capability of harming.

3. ENVIRONMENT
This section gives a view about the gaming environment and graphics.

4. START SCREEN OF AI

5. ‘NOOB’ MODE
• The ‘Noob’ mode is designed with lower difficulty.
• Gaming environment of this mode is an alien city consists of rocky buildings and
different utensils scattered here and there. Even some of them are floating in the
air by alien force.
• The city is placed in the space.
• Predictably, in this mode enemies have less harming capabilities and less life.
Additionally, creation of new enemies is relatively slow.

6. NOOB MODE SCENE

7. REGULAR MODE
• The Regular mode is designed with medium difficulty.
• The gaming environment of regular mode is a forest with hills surrounding it.
• The hills can be climbed by the player but cannot be crossed as it is surrounded
by invisible walls of the aliens.
• On the contrast of Noob mode, in Pro mode enemies have more harming
capabilities and more life. Additionally, creation of new enemies is relatively fast.

8. REGULAR MODE SCENE

9. PRO MODE
• Pro mode is designed with highest difficulty.
• Gaming environment of this mode is a cave made of mud and rock.
• The labyrinthine design of the cave makes the user unable to get out of it.
• Unlike the previous modes, the cave is a narrow pathway and the user cant go
here and there without meeting the enemies.
• Here the enemies are spawned in fastest period and makes a rally of enemies in
no time.

10. PRO MODE SCENE

11. ENEMIES
This section gives a view about the enemies.

12. INTRODUCE GOBLIN
• Goblin has two version differentiated
by its color. First one is green and
second one is white.
• Green Goblin has less life and gets
spawned slower. On the contrary, white
Goblin has more life and gets spawned
faster.
• Both the Goblins have a shield to
protect itself and a weapon to hurt the
player.

13. INTRODUCE TROLL
• Troll is the stronger enemy in the
game.
• It has more life.
• It hurts the player more.
• As it is hard to handle, it is spawned
relatively slower than Goblin.

14. GAME PLAY
This section contains basic information about game play.

15. GAMING EXPERIENCE
• In the starting scene, the player has the option to enter the game or exit it.
• When the user chooses to play a new game, a option will be shown to choose
between Pro mode, Medium mode and Noob mode.
• The gaming experience in all modes is almost same except the difficulty.

16. GAMING EXPERIENCE CONT.
• The control of the game follows the basics of most of the shooting games. The
left mouse button for shooting and keyboard button ‘R’ for reloading.
• The Escape button shows the mouse cursor for necessary work and by clicking
the game scene the cursor can be hid again.
• Pressing backspace while playing the game shows additional option containing
‘Exit’ and ‘Resume’ button. By pressing ‘Exit’ the player can return to main menu
again.
• When the game is over, the player will have both the options for ‘Retry’ and ‘Exit’
the game.

17. PAUSE SCENE

18. GAMING EXPERIENCE CONT.
• The game scene contains basic information about gameplay.
• In the bottom left corner, a number less or equal to hundred is shown inside a
heart. This is players current health. If it becomes zero, the game will be over.
• In the bottom right corner, a number less or equal to hundred is shown beside a
magazine. This number of bullet. Player will be needed to reload the gun when
the magazine gets empty.
• In the upper left corner, the playing time is shown.
• In the upper right corner, the number of enemy killed is shown.

19. SCREEN SECTIONS

20. GAMING EXPERIENCE CONT.
• There are some tricky part of the game. Although the enemy follows the player
all the time, it cant access all the paths. Blocks in the Noob mode and hills in the
Pro mode are not always accessible by the enemies. So, the player can try this to
gather more points.
• The scoring procedure of the game consists of both the survival time and the
number of enemy killed. Killing a troll will give ten points and killing a goblin will
give five points. Survival of every second gives a point. The final score is the
summation of these.

21. GAME OVER SCENE

22. CONCLUSION
• Alien Invasion (AI) is designed for a user for the best gaming experience.
• Its graphics is much light weight with respect to its quality. As same object is used
again and again by creating prefabs, huge amount of memory saved from storing
definitions of objects.
• Several Sound Effects are attached for real time gaming experience.
• We are hopeful to give the user a remarkable gaming experience.

23. SPECIAL THANKS TO
DR. RAMESWAR DEBNATH
• Professor
• Computer Science & Engineering
Discipline
• Khulna University
• Khulna
DEBASISH CHAKROBORTI
• Lecturer
• Computer Science & Engineering
Discipline
• Khulna University
• Khulna

24. CONTRIBUTED BY
PARVEZ MAHBUB
• Student ID: 150204
• Computer Science & Engineering
Discipline
• Khulna University
• Khulna
SADIA MAHJABIN
• Student ID : 150219
• Computer Science & Engineering
Discipline
• Khulna University
• Khulna

25. THE END