**Information is valid up to level 15 of the character.** *** **At higher levels, monsters gain powerful buffs, so tactics change slightly. It is recommended to use equipment for reducing the speed of reload weapons, increasing the running speed etc.** *** Recommended tips: 1. Use the most powerful weapon. 2. Use reinforced ammunition. 3. Against a zombie with a shield, use grenades or grenade launcher. *** [**Map Space Resort**](http://i.piccy.info/i9/da4bcad0f97dfc2f790e64cd2390b38e/1531587278/536317/1257650/SpaceResort_SAS4.jpg) **Rating A+; only 2 turrets are used.** ***  Hints > Step 1. Move up to the fountain and install the turret (picture 1). Important: the turret should be positioned so that it can be extracted by fire to the emerging zombies from above and from below to the left of the fountain. *** > Step 2. After installing the turret at the fountain, without stopping we move right to the point (picture 2). Install the turret in front of the box, above or below the steps. Important: expect up to ~ 1:37. We help the turret and destroy the zombies that broke from point (picture 1). *** > Step 3. We move down to the point (picture 3). At ~ 1:35, zombies will come out of the aisle to the right. Do not allow them to cause significant damage to the box (more than 50%). Important: destroy the zombies and at ~ 1:10 move left to the point (picture 4). *** > Step 4. At ~ 1:00 zombies will start to emerge from the aisle below. We destroy them to ~ 0:40. Important: in this position, you can increase the skill of owning grenades. *** > Step 5. Return to the point (picture 1). When the time reaches ~ 0:35, the strongest wave of zombies will appear. Important: zombies running from the passage from above and from below to the left. Try to exterminate of them to ~ 0:15. *** > Step 6. If you managed to defeat all the zombies at the fountain, then at ~ 0:10 the last wave of zombies will exit from the right-top and right-bottom passes (pictures 2 and 3). Try to stop them before they destroy the boxes. Important: use cryo-grenades or grenade launcher. *** [**Map Compound**](http://i.piccy.info/i9/0bd9ce1f2651e24d03de79381ea75f4b/1531590892/501794/1257650/Compound_SAS4.jpg) **Rating A+; only 2 turrets are used.** ***  Hints > Step 1. We move left to the point and install the turret (picture 1). Important: the turret must control two passes. *** > Step 2. We return to the starting position and destroy the advancing zombies from above and from below to the right. Destroy zombies and are waiting for up to ~ 1:40 Important: sometimes on top are run large slow zombies, check and quickly destroy it. *** > Step 3. We move down and left to the point (picture 2), at ~ 1:35 zombies will appear. Set the turret in a corner and immediately go right to the point (picture 3). Destroy the zombies and are waiting for up to ~ 1:15. Important: act quickly, do not let the zombie damage the box (more than 50%) at the point (picture 3). *** > Step 4. We move up and left to the point (picture 4). We are waiting for a wave of zombies ~ 1:00. Destroy and move down to the point at ~ 00:37 (picture 3). Important: you need to stand so that you can help the turret destroy zombies with shields going from above and from below (picture 1). *** > Step 5. At ~ 00:35 a wave of zombies appears from above and from the left (picture 3). Destroy and move to the point (picture 1). At ~ 00:07 the last wave of zombies appears. Important: at the point (picture 3) it is convenient to increase the skill of owning grenades or powerful weapons (grenade launchers, flamethrowers, sniper rifles etc). At the point (picture 1) at the last wave, beware of zombies with shields (appear from below). *** [**Map Uranium Mine**](http://i.piccy.info/i9/e68da4ec7953c04cc941ae82c3102cc3/1531684616/246957/1257650/UraniumMine_SAS4.jpg) **Rating A+; only 2 turrets are used.** ***  Hints > Step 1. We move left to the point (picture1), install the turret. Important: the turret should be on the bottom-left of the box to protect the box from the zombies with shields from the aisles from below and to the left. *** > Step 2. After installing the turret, without stopping we move up to the point (picture 2) and protect the box from the zombies. Important: do not destroy barrels bio-explosives, they will come in handy on the last waves. *** > Step 3. Destroy the zombies and move right to the point (picture 3) and install the turret above the box on the left or right. After installing the turret, move right to the point (picture 4) and wait until ~ 1:30, then destroy all zombies appearing from the passage to the right and sometimes to the left from above. We are waiting for ~ 1:10. Important: do not forget about slowest big zombies from the corridor on the right. *** > Step 4. At ~ 1:10 we move down to the point (picture 5) and destroy all the zombies that appeared from the corridor from below at ~ 1:05. Important: this point it is convenient to improve the skills of possession of grenades and powerful weapons (grenade launchers, flamethrowers, sniper rifles etc). *** > Step 5. At ~ 00:45 we move left and up to the point (picture 2). At ~ 00:35 the strongest wave of zombies appears. Destroy all zombies and watch for the first turret (HVM Heavy Machine Gun). Important: control the panel on the bottom and the sound of the work of the first turret. As soon as the turret disappears, move down to the point (picture 1) and destroy the zombies, then immediately move up to the point (picture 2) and destroy the remnants of the wave. Here you will be helped very much by barrels with bio-explosives. At ~ 00:07 the last remnants of the wave will appear from the corridor on the left (picture 2), but they usually do not pose any threat. *** [**Map Sea Lab**](http://i.piccy.info/i9/5b731ad274b3fc84118abfb919d63e2d/1531685670/288141/1257650/SeaLab_SAS4.jpg) **Rating A+; only 2 turrets are used.** ***  Hints > Step 1. We move down to the point for installing the turret (picture 1), then move to the mark to the right and wait there until ~ 1:45. Important: watch the zombies from the bottom-right passage (under the label), if you are standing right, the zombies will go the aisle to the left to the turret. *** > Step 2. At ~ 1:45 we begin to move up the corridor (do not go along the bridge) to the point (picture 2) and install the turret in the passage. Important: do not install the turret too far into the passage. The turret must protect the boxes. *** > Step 3. After installing the second turret, without stopping we move down and to the left to the point (picture 3) and at ~ 1:30 from the passages zombies will start leaving. Destroy everyone. Important: stand on the marks at the bottom corridor - then the zombies will go directly to you and will not harm the box (picture 5). Do not let the zombies damage the boxes (more than 50%). *** > Step 4. We move up and to the right to the point (picture 4). Destroy those appearing in the ~ 1:05 zombies. We are waiting for ~ 00:45. Important: at this point it is convenient to increase the skills of owning grenades and powerful weapons (grenade launchers, flamethrowers, sniper rifles etc). *** > Step 5. Move left to the point (picture 1) and become near the turret. At ~ 00:30 appear zombies. We destroy them all. Important: help the turret and try not to move, then the zombies from above will not change the direction of movement and will not cause significant damage to the boxes. *** > Step 6. After destroying the zombies, move to the right to the point (picture 5). At ~ 00:07 the last wave of zombies will appear. Try to stand on the marks and the zombies from the right corridor will go to you. Important: be very careful. Sometimes a zombie can not be seen in a dark corridor. Focus on the minimap. *** [**Map Highway**](http://i.piccy.info/i9/dec382990ce9a3908835b722ed43b581/1532271129/571706/1257650/Highway_SAS4.jpg) **Rating A+; only 2 turrets are used.** ***  Hints > Step 1. Install the turret (picture 1) and immediately move to the boxes on the east of the highway (picture 2). Important: turret must protect the bottom box and prevent the zombies from breaking through. *** > Step 2. Destroy all enemies at the top and bottom boxes. Important: do not allow enemies to damage the boxes (especially the south) more than 50%. *** > Step 3. We are moving south to the point (picture 3). At ~ 1:30, there will be zombies. We destroy them all. Important: enemies come from both sides, defend the box. *** > Step 4. We are moving north to the point (picture 4). At ~ 1:05 zombies will appear. We destroy them all. At ~ 00:35 there will be another zombies wave. Before its appearance, install the turret above the box on the right. Important: destroy the wave to the left of the box and help the turret cope with the zombies with shields. *** > Step 5. At ~ 00:15 we begin to move to the east to the point (picture 2). We protect the box in the south or both boxes (in the north and south). Important: you can destroy only the enemies at the bottom box, there is only one exit for the zombie. If you lose the top box, the rating will still be A +. *** **Map Crash Site** *** > 25 attempts were made. Rating A+ = 1 attempts. Rating A = 4 attempts. Rating A- = 7 attempts. Rating B+ = 13 attempts. Conclusion: do not recommend this map to obtain favorable turrets. ***

The guide is updated.